France names first attacker, vows to destroy ISIS

Paris Terror Attacks: Officials Piece Together Assailants' IDs

PARIS (Reuters) -- Police questioned on Sunday the relatives of one of the suicide attackers who brought carnage to Paris on Friday, with France denouncing the strikes as an act of war and vowing to destroy the Islamic State in Syria and Iraq.

Paris prosecutor Francois Molins told reporters that three jihadist cells staged co-ordinated hits at bars, a concert hall and soccer stadium killing 129 people and injuring 352, including 99 who were in a serious condition.

Museums and theaters remained shuttered in Paris for a second day on Sunday, with hundreds of soldiers and police patrolling the streets and metro stations after French President Francois Hollande declared a state of emergency.

To see more on the attacks, scroll through the gallery below:

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Paris terror attack scene, shootings, bombings
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France names first attacker, vows to destroy ISIS
People run after hearing what is believed to be explosions or gun shots near Place de la Republique square in Paris on November 13, 2015. At least 18 people were killed in several shootings and explosions in Paris today, police said. AFP PHOTO / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)
Spectators gather on the pitch of the Stade de France stadium following the friendly football match between France and Germany in Saint-Denis, north of Paris, on November 13, 2015, after a series of gun attacks occurred across Paris as well as explosions outside the national stadium where France was hosting Germany. At least 18 people were killed, with at least 15 people killed at the Bataclan concert hall in central Paris, only around 200 metres from the former offices of Charlie Hebdo which were attacked by jihadists in January. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)
PARIS, FRANCE - NOVEMBER 14: French officials and medics work near Le Petit Cambodge restaurant in the 11th district after a drive-by shooting killing 11 people, November 14, 2015, Paris, France. At least 142 people were killed deadly shootings and explosions took place in several neighbourhoods of Paris. 1,500 troops deployed in French capital says Elysse. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)
Two men evacuate the Place de la Republique square in Paris as a police officer looks on, after several shootings on November 13, 2015. At least 18 people were killed in several shootings and explosions in Paris today, police said. AFP PHOTO / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)
PARIS, FRANCE - NOVEMBER 13: Police survey the area of Boulevard Baumarchais after an attack in the French capital on November 13, 2015 in Paris, France. At least 18 people were killed in a series of gun attacks across Paris, as well as explosions outside the national stadium where France was hosting Germany. (Photo by Thierry Chesnot/Getty Images)
Rescuers rush to the scene following an attack in the 10th arrondissement of the French capital Paris, on November 13, 2015. At least 18 people were killed as multiple shootings and explosions hit Paris, police said. Police also said there was an ongoing hostage crisis in the Bataclan a concert hall in the French capital. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)
PARIS, FRANCE - NOVEMBER 14: French officials and medics work near Le Petit Cambodge restaurant in the 11th district after a drive-by shooting killing 11 people, November 14, 2015, Paris, France. At least 142 people were killed deadly shootings and explosions took place in several neighbourhoods of Paris. 1,500 troops deployed in French capital says Elysse. (Photo by Mustafa Yalcin/Anadolu Agency/Getty Images)
A firefighter attend to an injured person lying on a stretcher near the Bataclan concert hall in central Paris, on November 14, 2015. At least 39 people were killed in an 'unprecedented' series of bombings and shootings across Paris and at the Stade de France stadium on November 13. AFP PHOTO / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)
People are evacuated by bus, near the Bataclan concert hall in central Paris, on November 14, 2015. More than 100 people were killed in a mass hostage-taking at a Paris concert hall on November 13 and many more were feared dead in a series of bombings and shootings, as France declared a national state of emergency. AFP PHOTO / MARTIN BUREAU (Photo credit should read MARTIN BUREAU/AFP/Getty Images)
WASHINGTON, DC - NOVEMBER 13: U.S. President Barack Obama departs the White House briefing room after delivering remarks on the recent violence taking place in Paris, France November 13, 2015 in Washington, DC. Gunfire and explosions erupted in the French capital with early casualty reports indicating at least 60 dead. (Photo by Win McNamee/Getty Images)
Football fans leave the Stade de France stadium following the friendly football match between France and Germany in Saint-Denis, north of Paris, on November 13, 2015, after a series of gun attacks occurred across Paris as well as explosions outside the national stadium where France was hosting Germany. At least 18 people were killed, with at least 15 people killed at the Bataclan concert hall in central Paris, only around 200 metres from the former offices of Charlie Hebdo which were attacked by jihadists in January. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)
supporters run in panic on the pitch during the International friendly match between France and Germany on November 13, 2015 at the Stade France in Paris, France.(Photo by VI Images via Getty Images)
Police are seen outside a cafe-restaurant in 10th arrondissement of the French capital Paris, on November 13, 2015. At least 18 people were killed as multiple shootings and explosions hit Paris, police said. Police also said there was an ongoing hostage crisis in the Bataclan a concert hall in the French capital. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)
A policeman stands behind a cordon blocking the street near the site of an attack in a restaurant in Paris on November 13, 2015. At least 18 people were killed in multiple attacks in Paris Friday, including one near the Stade de France sports stadium and another at a concert venue. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)
A victim lies on the ground covered by a white sheet (Rear L) as special police work at the attack scene rue Bichat, in central Paris, early on November 14, 2015. More than 100 people were killed in a mass hostage-taking at a Paris concert hall late on November 13 and many more were feared dead in a series of bombings and shootings, as France declared a national state of emergency. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)
Firefighters and rescuers evacuate injured people near the Bataclan concert hall in central Paris, on November 14, 2015. At least 39 people were killed in an 'unprecedented' series of bombings and shootings across Paris and at the Stade de France stadium on November 13. AFP PHOTO / DOMINIQUE FAGET (Photo credit should read DOMINIQUE FAGET/AFP/Getty Images)
People are evacuated following an attack at the Bataclan concert venue in Paris, on November 13, 2015. At least 18 people were killed in multiple attacks in Paris Friday, including one near the Stade de France sports stadium. AFP PHOTO / KENZO TRIBOUILLARD (Photo credit should read KENZO TRIBOUILLARD/AFP/Getty Images)
Forensic experts inspect the site of an attack outside the Stade de France stadium in Saint-Denis, north of Paris, early on November 14, 2015, after a series of gun attacks occurred across Paris as well as explosions outside the national stadium where France was hosting Germany. A number of people were killed and others injured in a series of gun attacks across Paris, as well as explosions outside the national stadium where France was hosting Germany. AFP PHOTO / FRANCK FIFE (Photo credit should read FRANCK FIFE/AFP/Getty Images)
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Seven gunmen, all of whom were wearing suicide vests packed with explosives, died in the multiple assaults.

French media said he was French-born and of Algerian descent. Molins said the man had a security file for Islamist radicalization, adding that he had a criminal record but had never spent time in jail.

A judicial source said Mostefai's father and brother had been taken in for questioning, along with other people believed to be close to him.

Another source said police had found a car in a suburb east of Paris that was believed to have been used in the assault, suggesting that at least one of the attackers had escaped.

Watch more below:

New Video Appears to Show Attack

Prosecutors said the slaughter -- claimed by Islamic State as revenge for French military action in Syria and Iraq -- appeared to involve a multinational team with links to the Middle East, Belgium and possibly Germany as well as home-grown French roots.

Greek officials said one and perhaps two of the assailants had passed through Greece in October from Turkey alongside Syrian refugees fleeing violence in their homeland.

"We are at war. We have been hit by an act of war, organized methodically by a terrorist, jihadist army," Prime Minister Manuel Valls told TF1 television on Saturday night.

"Because we are at war we will take exceptional measures. We will act and we will hit them. We will hit this enemy to destroy them, obviously in France and Europe ... but also in Syria and Iraq," he said. "We will win."

France was the first European state to join U.S. air strikes against Islamic State targets in Iraq in September 2014, while a year later it extended its air strikes to Syria.

It had already scheduled to send an aircraft carrier to the region later this month.

Watch more coverage:

Memorial Grows Outside Bataclan Concert Hall

The names of the first victims have started to filter out on social media, many of them young people who were out enjoying themselves on a Friday night. The dead included one U.S. citizen, one Swede, one Briton, two Belgians, two Romanians and two Mexicans, their governments said.

In the worst carnage, three gunmen systematically killed at least 89 people at a rock concert by an American band at the Bataclan theater before detonating explosive belts as anti-terrorist commandos launched an assault.

It was the deadliest attack in France since World War Two and the worst such assault in Europe since the Madrid train bombings of 2004, in which Islamists killed 191 people.

Quoting an unnamed senior official, Israeli television said Israel's spy services saw a "clear operational link" between the Paris mayhem, suicide bombings in Beirut on Thursday, which killed 43, and the Oct. 31 downing of a Russian airliner in the Egyptian Sinai, where 224 people died.

France had been on high alert since Islamist gunmen attacked the satirical weekly Charlie Hebdo and a kosher supermarket in January, killing 18 people.

Watch more coverage:

Paris Terror Attack Is Part of a War: Former French President

Those attacks briefly united France in defense of freedom of speech, with a mass demonstration of more than a million people. But that unity has since broken down, with far-right populist Marine Le Pen gaining on both mainstream parties by blaming France's security problems on immigration and Islam.

If confirmed, the infiltration of militants into the flow of refugees to carry out attacks in Europe could have far-reaching political consequences.

The attacks fueled a debate raging in Europe about how to handle the influx of hundreds of thousands of refugees and other migrants propelled by civil war in Syria, Iraq and Libya.

For more on the reactions to the attack, scroll through the gallery below:

18 PHOTOS
Paris terror attack memorials, aftermath, world reaction
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France names first attacker, vows to destroy ISIS
SYDNEY, AUSTRALIA - NOVEMBER 14: A woman with a French flag painted in her face cries during a vigil for victims of the Paris terror attacks at Martin Place on November 14, 2015 in Sydney, Australia. At least 120 people have been killed and over 200 injured, 80 of which seriously, following a series of terrorist attacks in the French capital. (Photo by Daniel Munoz/Getty Images)
PARIS, FRANCE - NOVEMBER 27: President of France Francois Hollande attends The National Tribute to The Victims of The Paris Terrorist Attacks at Les Invalides on November 27, 2015 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)
PARIS, FRANCE - NOVEMBER 15: People gather and sing songs at Place de la Republique on November 15, 2015 in Paris, France. As France observes three days of national mourning members of the public continue to pay tribute to the victims of Friday's deadly attacks. A special service for the families of the victims and survivors is to be held at Paris's Notre Dame Cathedral. (Photo by Jeff J Mitchell/Getty Images)
PARIS, FRANCE - NOVEMBER 15: Members of the public gather to lay flowers and light candles at La Belle Equipe restaraunt on Rue de Charonne following Fridays terrorist attack on November 15, 2015 in Paris, France. As France observes three days of national mourning members of the public continue to pay tribute to the victims of Friday's deadly attacks. A special service for the families of the victims and survivors is to be held at Paris's Notre Dame Cathedral later on Sunday. (Photo by Jeff J Mitchell/Getty Images)
BERLIN, GERMANY - NOVEMBER 14: People finish arranging candles into the word 'Paris' next to flowers and messages left at the gate of the French Embassy following the recent terror attacks in Paris on November 14, 2015 in Berlin, Germany. Hundreds of people came throughout the day to lay flowers, candles and messages of condolence to mourn the victims of attacks last night in Paris that left at least 120 people dead across the French capital. The Islamic State (IS) has claimed responsibility for the attacks that were carried out by at least eight terrorists.. (Photo by Sean Gallup/Getty Images)
PARIS, FRANCE - NOVEMBER 14: Bono and band members from the band U2 place flowers on the pavement near the scene of yesterday's Bataclan Theatre terrorist attack on November 14, 2015 in Paris, France. At least 120 people have been killed and over 200 injured, 80 of which seriously, following a series of terrorist attacks in the French capital. (Photo by Jeff J Mitchell/Getty Images)
PARIS, FRANCE - NOVEMBER 14: A woman cries near Le Petit Cambodge restaurant, the day after a deadly attack on November 14, 2015 in Paris, France. At least 120 people have been killed and over 200 injured, 80 of which seriously, following a series of terrorist attacks in the French capital. (Photo by Antoine Antoniol/Getty Images)
BERLIN, GERMANY - NOVEMBER 14: People arrive to lay candles and flowers at the gate of the French Embassy as the Brandenburg Gate stands behind illuminated in the colors of the French flag following the recent terror attacks in Paris on November 14, 2015 in Berlin, Germany. Hundreds of people came throughout the day to lay flowers, candles and messages of condolence to mourn the victims of attacks last night in Paris that left at least 120 people dead across the French capital. The Islamic State (IS) has claimed responsibility for the attacks that were carried out by at least eight terrorists. (Photo by Sean Gallup/Getty Images)
JERUSALEM, ISRAEL - NOVEMBER 15: Ultra Orthodox Jewish men pass as Jerusalem's Old City wall is illuminated with the colours of the French national flag to show solidarity for the victims of the Paris attacks on November 15, 2015 in Jerusalem, Israel. At least 129 people have been killed and over 300 are injured in Paris following a series of terrorist acts in the French capital on Friday. (Photo by Lior Mizrahi/Getty Images)
NEW YORK, NY - NOVEMBER 14: A woman cries outside of the Consulate General of France in New York the day after an attack on civilians in Paris on November 14, 2015 in New York City. At least 100 people were killed in a popular Paris concert hall, one of at least 6 terror attacks in the French capital. The French president Francois Hollande closed French borders following the attacks. (Photo by Spencer Platt/Getty Images)
French soldiers patrol the area at the foot of the Eiffel Tower in Paris on November 14, 2015 following a series of coordinated attacks in and around Paris late Friday which left more than 120 people dead. French President Francois Hollande blamed the Islamic State group for the attacks in Paris that left at least 128 dead, calling them an 'act of war'. The multiple attacks across the city late Friday were 'an act of war... committed by a terrorist army, the Islamic State, against France, against... what we are, a free country,' Hollande said. AFP PHOTO / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
PARIS, FRANCE - NOVEMBER 15: A rose is placed beside a bullet hole at La Belle Equipe restaraunt on Rue de Charonne following Fridays terrorist attack on November 15, 2015 in Paris, France. As France observes three days of national mourning members of the public continue to pay tribute to the victims of Friday's deadly attacks. A special service for the families of the victims and survivors is to be held at Paris's Notre Dame Cathedral later on Sunday.(Photo by Jeff J Mitchell/Getty Images)
SYDNEY, AUSTRALIA - NOVEMBER 14: Pedestrians walk in front of the Sydney Opera House as its sails are illuminated in the colours of the French flag on November 14, 2015 in Sydney, Australia. At least 120 people have been killed and over 200 are injured in Paris following a series of terrorist acts in the French capital on Friday. (Photo by Daniel Munoz/Getty Images)
SHANGHAI, CHINA - NOVEMBER 14: Benjamin Hebert of France with a message for Paris on his golf cap during the third round of the BMW Masters at Lake Malaren Golf Club on November 14, 2015 in Shanghai, China. (Photo by Ross Kinnaird/Getty Images)
People lay flowers and light candles in front of French Embassy in Warsaw on November 14, 2015 following a series of terror attacks in the French city of Paris and its surroundings that has left at least 120 people dead and some 200 wounded. AFP PHOTO / JANEK SKARZYNSKI (Photo credit should read JANEK SKARZYNSKI/AFP/Getty Images)
SYDNEY, AUSTRALIA - NOVEMBER 14: A man hold a French flag and a sign during a vigil for victims of the Paris terror attacks at Martin Place on November 14, 2015 in Sydney, Australia. At least 120 people have been killed and over 200 injured, 80 of which seriously, following a series of terrorist attacks in the French capital. (Photo by Daniel Munoz/Getty Images)
PARIS, FRANCE - NOVEMBER 14: A man reads a French newspaper after a terrorist attack on November 14, 2015 in Paris, France. At least 120 people have been killed and over 200 injured, 80 of which seriously, following a series of terrorist attacks in the French capital. (Photo by Pascal Le Segretain/Getty Images)
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