Egypt probing 'noise' heard in Russian Metrojet's final moment

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Official: Noise at Last Second of Metrojet Cockpit Recording Being Analyzed

Egyptian officials probing why a Russian charter jet crashed in the Sinai Peninsula are investigating a "noise" heard in the final second of the flight data recording, they said Saturday.

"A spectrum analysis will be carried out to identity the nature of this noise," Ayman al-Muqaddam, head of the investigation committee, said during a news conference. Such an analysis would help investigators determine the origin of the sound.

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The confirmation of the noise comes after Russia's Interfax news agency reported earlier this week that sounds taken from cockpit recordings from the black boxes were "uncharacteristic of a standard flight."

There has been no definitive cause as to what brought down the Metrojet Airbus A321 after it took off from Sharm al-Sheikh Airport on Oct. 31, although Western officials have said it's possible it was downed by a bomb.

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Egypt probing 'noise' heard in Russian Metrojet's final moment
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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Intelligence reports have indicated that a device placed on the airliner caused it to break up in midair, killing all 224 on board, U.S. officials told NBC News.

Muqaddam during the news conference did not confirm that a bomb or an explosion was involved. The black boxes were retrieved the day of the crash, he said.

The crash occurred 23 minutes into the flight, when the auto-pilot was still engaged, and debris was scattered over a wide area extending for 8 miles "which is consistent with an in-flight break-up," he added.

"The committee is considering with great attention all possible scenarios for the cause of the accident and did not reach till the moment any conclusion in this regard," Muqaddam said.

Britain and Russia have suspended flights to and from the Red Sea resort city out of concern for travelers' safety.

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