US detects heat around doomed Russian jet before crash

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Details Only Adding To Mystery Of Russian Airliner Crash

ST. PETERSBURG, Russia (AP) -- U.S. satellite systems detected heat around a Russian passenger jet before it crashed in Egypt and killed all 224 people aboard, two U.S. officials said Tuesday.

One of the officials said they ruled out a missile striking the Metrojet Airbus A321-200 because neither a launch nor an engine burn had been detected.

The infrared activity that was detected could mean many things, including a bomb or that an engine on the plane exploded because of a malfunction.

See photos of the crash site:

36 PHOTOS
Russian plane crash in Egypt wreckage and aftermath
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US detects heat around doomed Russian jet before crash
In this photo made available Monday, Nov. 2, 2015, and provided by Russian Emergency Situations Ministry, Egyptian Military on cars approach a plane's tail at the wreckage of a passenger jet bound for St. Petersburg in Russia that crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Russian cargo plane on Monday brought the first bodies of Russian victims killed in a plane crash in Egypt home to St. Petersburg, a city awash in grief for its missing residents. (Maxim Grigoriev/Russian Ministry for Emergency Situations via AP)
In this Russian Emergency Situations Ministry photo, made available on Monday, Nov. 2, 2015, Russian Emergency Ministry experts work at the crash site of a Russian passenger plane bound for St. Petersburg in Russia that crashed in Hassana, Egypt's Sinai Peninsula, on Monday, Nov. 2, 2015. A Russian cargo plane on Monday brought the first bodies of Russian victims home to St. Petersburg, from Egypt.(Russian Ministry for Emergency Situations photo via AP)
In this Russian Emergency Situations Ministry photo, made available on Monday, Nov. 2, 2015 Egyptian soldiers collect personal belongings of plane crash victims at the crash site of a passenger plane bound for St. Petersburg in Russia that crashed in Hassana, Egypt's Sinai Peninsula, on Monday, Nov. 2, 2015. A Russian cargo plane on Monday brought the first bodies of Russian victims home to St. Petersburg, from Egypt.(Russian Ministry for Emergency Situations photo via AP)
In this Russian Emergency Situations Ministry photo, made available on Monday, Nov. 2, 2015, Russian Emergency Ministry experts work at the crash site of a Russian passenger plane bound for St. Petersburg in Russia that crashed in Hassana, Egypt's Sinai Peninsula, on Monday, Nov. 2, 2015. A Russian cargo plane on Monday brought the first bodies of Russian victims home to St. Petersburg, from Egypt.(Russian Ministry for Emergency Situations photo via AP)
Debris belonging to the A321 Russian airliner are seen at the site of the crash in Wadi el-Zolmat, a mountainous area in Egypt's Sinai Peninsula on November 1, 2015. International investigators began probing why a Russian airliner carrying 224 people crashed in Egypt's Sinai Peninsula, killing everyone on board, as rescue workers widened their search for missing victims. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
Debris of a Russian airplane is seen at the site a day after the passenger jet bound for St. Petersburg, Russia, crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Metrojet plane, bound for St. Petersburg in Russia, crashed 23 minutes after it took off from Egypt's Red Sea resort of Sharm el-Sheikh on Saturday morning. The 224 people on board, all Russian except for four Ukrainians and one Belarusian, died. (AP Photo)
In this photo made available Monday, Nov. 2, 2015, and provided by Russian Emergency Situations Ministry, Egyptian Military experts examine a piece of an engine at the wreckage of a passenger jet bound for St. Petersburg in Russia that crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Russian cargo plane on Monday brought the first bodies of Russian victims killed in a plane crash in Egypt home to St. Petersburg, a city awash in grief for its missing residents. (Maxim Grigoriev/Russian Ministry for Emergency Situations via AP)
A Russian investigator walks near wreckage a day after a passenger jet bound for St. Petersburg, Russia, crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Metrojet plane, bound for St. Petersburg in Russia, crashed 23 minutes after it took off from Egypt's Red Sea resort of Sharm el-Sheikh on Saturday morning. The 224 people on board, all Russian except for four Ukrainians and one Belarusian, died. (AP Photo/Amr Nabil)
A helicopter of the Egyptian security forces fly over the site a day after a passenger jet bound for St. Petersburg, Russia, crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Metrojet plane, bound for St. Petersburg in Russia, crashed 23 minutes after it took off from Egypt's Red Sea resort of Sharm el-Sheikh on Saturday morning. The 224 people on board, all Russian except for four Ukrainians and one Belarusian, died. (AP Photo)
In this photo taken Sunday, Nov. 1, 2015 and provided by Russian Ministry for Emergency Situations Monday, Nov. 2, Russian Emergency Situations Minister Vladimir Puchkov, left, talks with Russian Transport Minister Maxim Sokolov, fifth right, as they inspect the wreckage of a passenger jet bound for St. Petersburg in Russia that crashed in Hassana, Egypt. A Russian cargo plane on Monday brought the first bodies of Russian victims killed in the plane crash in Egypt home to St. Petersburg, a city awash in grief for its missing residents. (Maxim Grigoriev/Russian Ministry for Emergency Situations via AP)
In this photo made available Monday, Nov. 2, 2015, and provided by Russian Emergency Situations Ministry, Egyptian Military on cars approach a plane's tail at the wreckage of a passenger jet bound for St. Petersburg in Russia that crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Russian cargo plane on Monday brought the first bodies of Russian victims killed in a plane crash in Egypt home to St. Petersburg, a city awash in grief for its missing residents. (Maxim Grigoriev/Russian Ministry for Emergency Situations via AP)
SUEZ, EGYPT - NOVEMBER 01: A plane part is seen as the Egyptian officials inspect the crash site of Russian Airliner in Suez, Egypt on November 01, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on yesterday. According to Egypts Civil Aviation Authority, the plane had been lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Alaa El Kassas/Anadolu Agency/Getty Images)
Debris of the A321 Russian airliner lie on the ground a day after the plane crashed in Wadi al-Zolomat, a mountainous area in Egypt's Sinai Peninsula, on November 1, 2015. International investigators began probing why the Russian airliner carrying 224 people crashed in the Sinai Peninsula, killing everyone on board, as rescue workers widened their search for missing victims. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
Russian investigators stand near debris, luggage and personal effects of passengers a day after a passenger jet bound for St. Petersburg in Russia crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Metrojet plane crashed 23 minutes after it took off from Egypt's Red Sea resort of Sharm el-Sheikh on Saturday morning. The 224 people on board, all Russian except for four Ukrainians and one Belarusian, died. (AP Photo/Amr Nabil)
Debris of the A321 Russian airliner lie on the ground a day after the plane crashed in Wadi al-Zolomat, a mountainous area in Egypt's Sinai Peninsula, on November 1, 2015. International investigators began probing why the Russian airliner carrying 224 people crashed in the Sinai Peninsula, killing everyone on board, as rescue workers widened their search for missing victims. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
SUEZ, EGYPT - NOVEMBER 01: Egyptian officials inspect the crash site of Russian Airliner in Suez, Egypt on November 01, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on yesterday. According to Egypts Civil Aviation Authority, the plane had been lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Alaa El Kassas/Anadolu Agency/Getty Images)
SUEZ, EGYPT - NOVEMBER 01: Egyptian officials inspect the crash site of Russian Airliner in Suez, Egypt on November 01, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on yesterday. According to Egypts Civil Aviation Authority, the plane had been lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Alaa El Kassas/Anadolu Agency/Getty Images)
Members of the Egyptian security forces stand guard at the site a day after a passenger jet bound for St. Petersburg, Russia crashed in Hassana, Egypt, on Sunday, Nov. 1, 2015. The Metrojet plane, bound for St. Petersburg in Russia, crashed 23 minutes after it took off from Egypt's Red Sea resort of Sharm el-Sheikh on Saturday morning. The 224 people on board, all Russian except for four Ukrainians and one Belarusian, died. (AP Photo)
CAIRO, EGYPT - OCTOBER 31: Ambulances bring the bodies of the victims found at crash site of Russian Airliner, at Zinhoum Hospital's Morgue in Cairo, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Ibrahim Ramadan/Anadolu Agency/Getty Images)
CAIRO, EGYPT - OCTOBER 31: Ambulances bring the bodies of the victims found at crash site of Russian Airliner, at Zinhoum Hospital's Morgue in Cairo, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Ibrahim Ramadan/Anadolu Agency/Getty Images)
CAIRO, EGYPT - OCTOBER 31: Ambulances bring the bodies of the victims found at crash site of Russian Airliner, at Zinhoum Hospital's Morgue in Cairo, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Ibrahim Ramadan/Anadolu Agency/Getty Images)
CAIRO, EGYPT - OCTOBER 31: Ambulances bring the bodies of the victims found at crash site of Russian Airliner, at Zinhoum Hospital's Morgue in Cairo, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Ibrahim Ramadan/Anadolu Agency/Getty Images)
Egyptian ambulance arrives to Kabret military air base by the Suez Canal on October 31, 2015, after victims of a Russian airliner that crashed in the Sinai Peninsula were brought to the base before being transported to a morgue. Egypt's government said 15 bodies have been recovered and transferred to a morgue so far from the site of the crash. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
Egyptian paramedics load the corpses of Russian victims of a Russian passenger plane crash in the Sinai Peninsula, into a military plane at Kabret military air base by the Suez Canal on October 31, 2015. Egypt's government said 15 bodies have been recovered and transferred to a morgue so far from the site of the crash. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
SUEZ, EGYPT - OCTOBER 31: Egyptian officials receives the corpses of 34 passengers, found at crash site of Russian Airliner, at Kabret Military Base in Suez, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Mostafa El Shemy/Anadolu Agency/Getty Images)
Egyptian ambulances line up at Kabret military air base by the Suez Canal on October 31, 2015, after victims of a Russian airliner that crashed in the Sinai Peninsula were brought to the base before being transported to a morgue. Egypt's government said 15 bodies have been recovered and transferred to a morgue so far from the site of the crash. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
An Egyptian ambulance waits at Kabret military air base by the Suez Canal on October 31, 2015, after victims of a Russian airliner that crashed in the Sinai Peninsula were brought to the base before being transported to a morgue. Egypt's government said 15 bodies have been recovered and transferred to a morgue so far from the site of the crash. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
SUEZ, EGYPT - OCTOBER 31: Egyptian officials receives the corpses of 34 passengers, found at crash site of Russian Airliner, at Kabret Military Base in Suez, Egypt on October 31, 2015. A Russian Airbus-321 airliner with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Alaa El Kassas/Anadolu Agency/Getty Images)
Egyptian ambulances carrying the corpses of Russian victims of a Russian passenger plane crash in the Sinai Peninsula, off load the bodies into a military aircraft at Kabret military air base by the Suez Canal on October 31, 2015. Egypt's government said 15 bodies have been recovered and transferred to a morgue so far from the site of the crash. AFP PHOTO / KHALED DESOUKI (Photo credit should read KHALED DESOUKI/AFP/Getty Images)
Egyptian police officers stand guard outside the Zeinhom Morgue in Cairo on October 31, 2015, as they wait for the victims of the Russian charter plane. A Russian plane carrying 224 people crashed in a mountainous part of Egypt's Sinai Peninsula, killing everyone on board, officials said. AFP PHOTO /MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP/Getty Images)
Egyptian police officers stand guard, next to graffiti condemning police brutality, outside the Zeinhom Morgue in Cairo on October 31, 2015, as they wait for the victims of the Russian charter plane. A Russian plane carrying 224 people crashed in a mountainous part of Egypt's Sinai Peninsula, killing everyone on board, officials said. AFP PHOTO /MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP/Getty Images)
Egyptian police officers stand guard outside the Zeinhom Morgue in Cairo on October 31, 2015, as they wait for the victims of the Russian charter plane. A Russian plane carrying 224 people crashed in a mountainous part of Egypt's Sinai Peninsula, killing everyone on board, officials said. AFP PHOTO /MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP/Getty Images)
Egyptian police officers stand guard outside the Zeinhom Morgue in Cairo on October 31, 2015, as they wait for the victims of the Russian charter plane. A Russian plane carrying 224 people crashed in a mountainous part of Egypt's Sinai Peninsula, killing everyone on board, officials said. AFP PHOTO /MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP/Getty Images)
Egyptian police officers stand guard outside the Zeinhom Morgue in Cairo on October 31, 2015, as they wait for the victims of the Russian charter plane. A Russian plane carrying 224 people crashed in a mountainous part of Egypt's Sinai Peninsula, killing everyone on board, officials said. AFP PHOTO /MOHAMED EL-SHAHED (Photo credit should read MOHAMED EL-SHAHED/AFP/Getty Images)
ALTERNATIVE CROP - In this photo taken on Tuesday, Oct. 20, 2015, The Russian airline Kogalymaviaâs Airbus A321 with a tail number of EI-ETJ on an airstrip of Moscowâs Domodedovo international airport, outside Moscow, Russia. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane EI-ETJ, that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Tatiana Belyakova)
Map locates area in Egypt where a Russian airliner crashed Saturday; 3c x 4 inches; 146 mm x 101 mm;
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Aviation analyst Paul Beaver said the heat picked up by the satellite "indicates that there was a catastrophic explosion or disintegration of the airplane," but doesn't reveal what caused it.

"It doesn't tell us if it was a bomb ... or if somebody had a fight in the airplane with a gun - there is a whole raft of things that could happen in this regard," he said.

He said it also could indicate a fuel tank or engine exploding, although "engines are designed so that if something malfunctions or breaks off it is contained within the engine."

Both U.S. officials spoke on condition of anonymity because they weren't authorized to discuss the information publicly.

Some aviation experts earlier suggested a bomb was the most likely cause of Saturday's crash, while some others pointed at a 2001 incident in which the jet damaged its tail during landing.

In Egypt, an international team of experts prepared to analyze the plane's flight data and cockpit voice recorders.

The joint investigation committee, which includes Egyptian and Russian experts as well as representatives from Ireland, where the plane was registered, will conclude its last field inspection at the crash site by the end of the day Tuesday and start working on the black boxes, said Egyptian Civil Aviation Minister Hossam Kamal.

Kamal says it "will take some time" to produce the final report and that the committee "has all the tools and experts to deal with the investigation."

Russian Transport Minister Maxim Sokolov said in televised remarks that Russian experts already had conducted a preliminary inspection of the two "black boxes" and had seen information from Egypt's flight control radars, but he wouldn't mention any further details.

The Metrojet flight was en route from Egypt's Red Sea resort of Sharm el-Sheikh to St. Petersburg when it crashed in the Sinai Peninsula after breaking up at high altitude, Russian aviation officials said. All of the victims, except for four Ukrainians and one Belarusian citizen, were Russian vacationers flying home.

Islamic State militants said shortly after the crash that they had "brought down" the Russian plane because of Moscow's recent military intervention in Syria against the extremist group. But the group did not provide any evidence to back up its claim, and militants in northern Sinai have not shot down any commercial airliners or fighter jets.

Egyptian President Abdel-Fattah el-Sissi insisted that the security situation in the Sinai Peninsula is under "full control" and that claims by the Islamic State group that it downed the plane were "propaganda" aimed at damaging the country's image.

In an interview broadcast Tuesday by the BBC, el-Sissi also reiterated his assertion that the cause of the crash may not be known for months and that, until then, there should be no speculation about it.

Alexei Smirnov of the Russian Emergency Situations Ministry said 140 bodies and more than 100 body parts were delivered to St. Petersburg on two government planes on Monday and Tuesday and that a third plane is expected to bring more remains later on Tuesday. Families on Tuesday identified the first 10 victims.

Mourners continued to come to St. Petersburg's Pulkovo airport to lay flowers, toys and other tributes to the dead. On the outskirts of town, tearful families of the victims left a crematorium where the identification procedures are taking place.

Alexander Agafonov, head of the Russian rescue mission in Egypt, said in a televised conference with other officials that searchers have not found a single additional body Tuesday after combing a 28 square-kilometer (10.8 square-mile) area. Emergency Situations Minister Vladimir Puchkov said the site "should be studied centimeter by centimeter."

"If you need to sift through the sand where the remains or pieces of the fuselage could be, do it," he said.

--

Associated Press writers Nataliya Vasilyeva and Vladimir Isachenkov in Moscow, Brian Rohan in Cairo, Jill Lawless in London, Lolita C. Baldor in Washington, and Ivan Sekretarev in St. Petersburg contributed to this report.

PHOTOS: Russia mourns the 224 plane crash victims

43 PHOTOS
Russia mourns victims of plane crash in Egypt
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US detects heat around doomed Russian jet before crash
A woman reacts standing at pictures of the plane crash victims are attached to the fence at Dvortsovaya (Palace) Square in St.Petersburg, Russia, Tuesday, Nov. 3, 2015. Mourners continued to come to St. Petersburg's Pulkovo airport and Dvortsovaya Square on Tuesday to lay flowers and leave paper planes and soft toys at the arrivals hall. (AP Photo/Dmitry Lovetsky)
The Kremlin guards pass flowers and toys laid at the memorial stone with the word Leningrad (St. Petersburg) at the Tomb of the Unknown Soldier outside Moscow's Kremlin Wall in Moscow, Russia, Tuesday, Nov. 3, 2015. Mourners have been coming to St. Petersburg's airport and other places since Saturday with flowers, pictures of the victims, stuffed animals and paper planes. Metrojetâs Airbus A321-200 en route from Egyptâs Sharm el-Sheikh to St. Petersburg crashed over the Sinai Peninsula on Saturday, killing all 224 on board. (AP Photo/Pavel Golovkin)
A portrait of 10 month Darina Gromova, a victim of a plane crash, is surrounded by flowers and candles at an entrance of Pulkovo airport outside St. Petersburg, Russia, Monday, Nov. 2, 2015. In a massive outpouring of grief, thousands of people flocked to St. Petersburg's airport, laying flowers, soft toys and paper planes next to the pictures of the victims of the crash of a passenger jet in Egypt that killed all 224 on board in Russia's deadliest air crash to date. (AP Photo/Dmitry Lovetsky)
Young women grieve at an entrance of Pulkovo airport outside St.Petersburg, Russia, on Monday, Nov. 2, 2015. In a massive outpouring of grief, thousands of people flocked to St. Petersburg's airport, laying flowers, soft toys and paper planes next to the pictures of the victims of the crash of a passenger jet in Egypt that killed all 224 on board in Russia's deadliest air crash to date.(AP Photo/Dmitry Lovetsky)
A man and his daughter put flowers and a toy at an entrance of Pulkovo airport outside St.Petersburg, Russia, Wednesday, Nov. 4, 2015. A Russian official says families have identified the bodies of 33 victims killed in Saturday's plane crash over Egypt. The Russian jet crashed over the Sinai Peninsula early Saturday, killing all 224 people on board. Most of them were holidaymakers from Russia's St. Petersburg. (AP Photo/Dmitry Lovetsky)
A woman with her baby reacts as she stands near to floral tributes for the victims of a plane crash, at an entrance of Pulkovo airport outside St. Petersburg, Russia, Wednesday, Nov. 4, 2015. A Russian official says families have identified the bodies of 33 victims killed in Saturday's plane crash over Egypt. The Russian jet crashed over the Sinai Peninsula early Saturday, killing all 224 people on board. Most of them were holidaymakers from Russia's St. Petersburg. (AP Photo/Dmitry Lovetsky)
A picture of plane crash victims and a soft toy lie in memory to victims of a Metrojet plane crashed in Egypt at Dvortsovaya (Palace) Square in St. Petersburg, Russia, on Monday, Nov. 2, 2015. In a massive outpouring of grief, thousands of people flocked to St. Petersburg's airport, laying flowers, soft toys and paper planes next to the pictures of the victims of the crash of a passenger jet in Egypt that killed all 224 on board in Russia's deadliest air crash to date. (AP Photo/Ivan Sekretarev)
A Russian national flag flies at half staff at Dvortsovaya (Palace) Square in St.Petersburg, Russia, on Monday, Nov. 2, 2015. In a massive outpouring of grief, thousands of people flocked to St. Petersburg's airport, laying flowers, soft toys and paper planes next to the pictures of the victims of the crash of a passenger jet in Egypt that killed all 224 on board in Russia's deadliest air crash to date. (AP Photo/Ivan Sekretarev)
People light candles during a day of national mourning for the plane crash victims at Dvortsovaya (Palace) Square in St. Petersburg, Russia, on Sunday, Nov. 1, 2015. The Metrojet charter crashed Saturday morning 23 minutes after taking off from Egypt's Red Sea resort of Sharm el-Sheikh, a top destination for Russian tourists. All 224 people on board died. (AP Photo/Dmitry Lovetsky)
A woman prays as she lights a candle in a church in St.Petersburg during a day of national mourning for the plane crash victims in St. Petersburg, Russia, on Sunday, Nov. 1, 2015. A Russian passenger plane has crashed in the Sinai peninsula Saturday with 217 passengers, mostly Russians, and seven Russian crew members killed. (AP Photo/Dmitry Lovetsky)
A man looks at candles and flowers in Simferopol on November 1, 2015 in memory of the victims of a jetliner crash. Russia mourned its biggest ever air disaster after a passenger jet full of Russian tourists crashed in Egypt's Sinai, killing all 224 people on board. A Russian airliner that crashed in Egypt broke up 'in the air', an investigator said on November 1, as the bodies of many of the 224 people killed on board were flown home. AFP PHOTO / MAX VETROV (Photo credit should read MAX VETROV/AFP/Getty Images)
SAINT PETERSBURG, RUSSIA - NOVEMBER 1: People mourn the victims of Airbus A321 crash at the Palace Square on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on October 31. According to Egypt's Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
A woman reacts in central Saint Petersburg on November 1, 2015, as people gather to light candles in memory of the victims of a jetliner crash. Flags flew at half-mast in Russia on November 1 as the country mourned its worst air disaster after a jetliner full of Russian tourists crashed in Egypt, killing all 224 on board. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
SAINT-PETERSBURG, RUSSIA - NOVEMBER 1: Russian people lay flowers, toys and light candles to memory of Russian plane accident in Egypt on October 31, at Dvortsovaya square in Saint-Petersburg, Russia on November 1, 2015. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
Women look at candles and flowers in Simferopol on November 1, 2015 in memory of the victims of a jetliner crash. Russia mourned its biggest ever air disaster after a passenger jet full of Russian tourists crashed in Egypt's Sinai, killing all 224 people on board. A Russian airliner that crashed in Egypt broke up 'in the air', an investigator said on November 1, as the bodies of many of the 224 people killed on board were flown home. AFP PHOTO / MAX VETROV (Photo credit should read MAX VETROV/AFP/Getty Images)
SAINT PETERSBURG, RUSSIA - NOVEMBER 01: A woman holds a candle at a memorial for the victims of Airbus A321 crash at the Pulkovo Airport on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on October 31. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
SAINT PETERSBURG, RUSSIA - NOVEMBER 01: A woman cries near a 'memorial' to the victims of the Airbus A321 crash at the Pulkovo Airport on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
A family photo of victims lies next to the toys and flowers during a day of national mourning for the plane crash victims at Dvortsovaya (Palace) Square in St. Petersburg, Russia, on Sunday, Nov. 1, 2015. The Metrojet charter crashed Saturday morning 23 minutes after taking off from Egypt's Red Sea resort of Sharm el-Sheikh, a top destination for Russian tourists. All 224 people on board died. (AP Photo/Dmitry Lovetsky)
SAINT PETERSBURG, RUSSIA - NOVEMBER 01: People mourn the victims of Airbus A321 crash at Pulkovo Airport on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
SAINT PETERSBURG, RUSSIA - NOVEMBER 01: Candles, toys and flowers are seen at the 'memorial' of the victims of the Airbus A321 crash at the Pulkovo Airport on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
A man with a girl lays flowers at an entrance of Pulkovo airport outside St.Petersburg, Russia, during a day of national mourning for the plane crash victims, on Sunday, Nov. 1, 2015. Hundreds of people are bringing flowers and pictures to St. Petersburg's airport to commemorate the 224 victims of the Russian plane crash in Egypt. (AP Photo/Dmitry Lovetsky)
People react as they come to lay flowers and toys at an the entrance of Pulkovo airport outside St. Petersburg, Russia, during a day of national mourning for the plane crash victims, on Sunday, Nov. 1, 2015. Hundreds of people are bringing flowers and pictures to St. Petersburg's airport to commemorate the 224 victims of Saturday's Russian plane crash in Egypt. (AP Photo/Dmitry Lovetsky)
A portrait of one of victims lies next to the toys and flowers at an entrance of Pulkovo airport outside St.Petersburg, Russia, during a day of national mourning for the plane crash victims, on Sunday, Nov. 1, 2015. Hundreds of people are bringing flowers and pictures to St. Petersburg's airport to commemorate the 224 victims of the Russian plane crash in Egypt. (AP Photo/Dmitry Lovetsky)
SAINT PETERSBURG, RUSSIA - NOVEMBER 01: People mourn the victims of Airbus A321 crash at Pulkovo Airport on November 1, 2015 in St. Petersburg, Russia. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St. Petersburg. (Photo by Alexander Aksakov/Getty Images)
A family lay flowers and toys at an entrance of Pulkovo airport outside St.Petersburg, Russia, during a day of national mourning for the plane crash victims, on Sunday, Nov. 1, 2015. The Russian Metrojet airliner crashed Saturday in a remote mountainous part of Egypt's Sinai Peninsula 23 minutes after taking off from a popular Red Sea resort, killing all 224 people on board, including 25 children. (AP Photo/Dmitry Lovetsky)
Relatives react at Pulkovo international airport outside Saint Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure, officials said. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
A relative of those on the Metrojet flight that crashed in Egypt react as they gather to grieve at a hotel near St. Petersburg's Pulkovo airport outside St.Petersburg, Russia, Saturday, Oct. 31, 2015. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Dmitry Lovetsky)
Relatives react at Pulkovo international airport outside Saint Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure, officials said. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
Relatives react after a Russian airliner with 217 passengers and seven crew aboard crashed, as people gather at Russian airline Kogalymaviaâs information desk at Pulkovo airport in St.Petersburg, Russia, Saturday, Oct. 31, 2015. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula.(AP Photo/Dmitry Lovetsky)
A relative of the victims of a Russian airliner with 217 passengers and seven crew aboard has crashed, reacts at Pulkovo airport in St.Petersburg, Russia, Saturday, Oct. 31, 2015. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Dmitry Lovetsky)
People gather at the airline information desk at of Russian airline Kogalymaviaâs desk at Pulkovo airport in St.Petersburg, Russia, Saturday, Oct. 31, 2015, after a Russian airliner with 217 passengers and seven crew aboard crashed. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Dmitry Lovetsky)
SAINT PETERSBURG, RUSSIA - OCTOBER 31: Relatives of passengers of Russian Airbus-321 aircraft react at Pulkovo international airport in Saint Petersburg, Russia on October 31, 2015. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
Relatives react at Pulkovo international airport outside Saint Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure, officials said. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
A relative reacts at Pulkovo international airport outside St Petersburg after an Airbus A321 of Russian airline Kogalymavia with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Egypt has recovered the black box of the Russian airliner that crashed on October 31 in the restive Sinai Peninsula, killing all 224 people on board, the prime minister's office said. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
A relative reacts at Pulkovo international airport outside Saint Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure, officials said. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
SAINT PETERSBURG, RUSSIA - OCTOBER 31: A relative of passengers of Russian Airbus-321 aircraft reacts at Pulkovo international airport in Saint Petersburg, Russia on October 31, 2015. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
Relatives of the victims of a Russian airliner with 217 passengers and seven crew aboard has crashed, react as they gather at Pulkovo airport in St.Petersburg, Russia, Saturday, Oct. 31, 2015. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Dmitry Lovetsky)
Relatives and the friends of those on the Metrojet flight that crashed in Egypt react while gathering to grieve at a hotel near St. Petersburg's Pulkovo airport outside St.Petersburg, Russia, Saturday, Oct. 31, 2015. Russia's civil air agency is expected to have a news conference shortly to talk about the Russian Metrojet passenger plane that Egyptian authorities say has crashed in Egypt's Sinai peninsula. (AP Photo/Dmitry Lovetsky)
SAINT PETERSBURG, RUSSIA - OCTOBER 31: Relatives of passengers of Russian Airbus-321 aircraft react at Pulkovo international airport in Saint Petersburg, Russia on October 31, 2015. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
Relatives wait for information at Pulkovo international airport outside Saint Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure, officials said. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
SAINT PETERSBURG, RUSSIA - OCTOBER 31: Relatives of passengers of Russian Airbus-321 aircraft react at Pulkovo international airport in Saint Petersburg, Russia on October 31, 2015. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
Relatives wait at the Pulkovo international airport outside St. Petersburg after a Russian plane with 224 people on board crashed in a mountainous part of Egypt's Sinai Peninsula on October 31, 2015. Ambulances reached the site and began evacuating 'casualties,' officials and state media reported, without elaborating on their condition. The plane took off early in the morning from the southern Sinai resort of Sharm el-Sheikh bound for Saint Petersburg in Russia but communication was lost 23 minutes after departure. AFP PHOTO / OLGA MALTSEVA (Photo credit should read OLGA MALTSEVA/AFP/Getty Images)
SAINT PETERSBURG, RUSSIA - OCTOBER 31: Relatives of passengers of Russian Airbus-321 aircraft react at Pulkovo international airport in Saint Petersburg, Russia on October 31, 2015. A Russian Airbus-321 aircraft with 224 people aboard crashed in Egypt's Sinai Peninsula on Saturday, according to the Egyptian Prime Minister's office. According to Egypts Civil Aviation Authority, the plane lost contact with air-traffic controllers shortly after taking off from the Egyptian Red Sea resort city of Sharm el-Sheikh en route to St Petersburg. (Photo by Sergey Mihailicenko/Anadolu Agency/Getty Images)
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