Three terror teams coordinated Paris attacks

UPDATE: The death toll in last night‘s terror attacks in Paris has risen to 129, with 352 injured. Of those, 99 victims are in critical condition.

French officials say three teams carried out the attacks at three separate sites. Most of the casualties occurred at a crowded rock concert at the Bataclan concert hall, where 89 people died.

Investigators are still trying to identify the attackers but confirmed one was a Frenchman known to intelligence officials as a terrorist sympathizer. The Syrian passport found by another dead attacker belonged to a man who entered Europe through Greece last month.

UPDATE (8 a.m. EDT): Islamic State (ISIS) militants claimed responsibility today for last night’s terror attacks in Paris, which left 127 people dead and about 200 wounded. President François Hollande vowed to strike back without mercy. He called the militants barbarians.

Officials now say at least eight attackers died during or after the assaults—seven as suicide bombers and one in a shootout with police. But it’s not yet clear whether others might have been involved. Security officials are scouring the country for possible accomplices. Investigators found a Syrian passport on one of the bombers, but they have not released any of the attackers’ names or nationalities.

Hollande ordered security checks at the French border and raised the country’s security alert system to its highest level. He also declared three days of national mourning for the victims.

As dawn broke over the city, Parisians ventured out of their apartments to offer help and honor the victims. Many lined up outside medical centers to donate blood for the wounded.

The nearly simultaneous attacks started at the national Stade de France stadium, where Hollande was among spectators for a friendly football match between France and Germany. Several bomb blasts went off around the stadium. Next, the attackers targeted a trendy nightspot, where an attacker sprayed outdoor diners with automatic gunfire. Officials say 37 people died there.

But the worst attack took place at the Bataclan, a concert hall hosting an American rock band. Attackers set off bombs inside the crowded theater and took hostages before anti-terror forces stormed the building. Another suicide bomber blew himself up in the street outside.

Fearing the threat of similar attacks, other European nations have heightened security and called meetings with intelligence experts. A U.S. official said last night no one had detected any chatter among terror groups about the Paris attack.

UPDATE (Nov. 13, 8:30 p.m. EDT): The death toll in tonight’s terror attacks in Paris could rise as high as 120, a local prosecutor said. At least five attackers are believed to have been involved.

Security officials who stormed a theater where attackers were holding 100 hostages found a bloody scene of carnage. The two attackers, who died during the police assault, had hurled bombs at their victims, killing many of them.

No group has claimed responsibility for the attacks, but Islamic terror groups took to Twitter to praise the violence. In a televised address to the nation, French President François Hollande pledged the country would not be swayed by attempts to stop its involvement in anti-terror campaigns in the Middle East.

“This is a terrible ordeal that again assails us,” he said. “We know where it comes from, who these criminals are, who these terrorists are.”

U.S. President Barack Obama called the attacks on Paris an “outrageous attempt to terrorize innocent civilians” and an “attack on all of humanity.” He vowed the United States would do everything in its power to bring the terrorists to justice.

UPDATE (Nov. 13, 6:25 p.m. EDT): French officials confirm two suicide bombers detonated themselves outside a crowded stadium north of Paris tonight, killing at least three people. Another bomb went off nearby. The three explosions went off simultaneously, according to a local police official.

The death toll in tonight’s shooting and bombing attacks has risen to at least 35.

Security forces have deployed at a theater where attackers are holding as many as 100 people hostage. French President François Hollande had ordered the French military into the city in the wake of the attacks and closed the country's borders.

No one has claimed responsibility yet for the attacks, but experts are pointing fingers at Islamic State militants.

OUR EARLIER REPORT (Nov. 13, 5:15 p.m. EST): Several terrorist attacks rocked Paris tonight, leaving at least 26 people dead.

According to officials, who are still trying to sort out the details, 11 people died in a shooting at the Le Carillon restaurant. Another 15 died at the Bataclan theater, where attackers are still holding 100 hostages.

North of the city, fans attending a France-Germany friendly football match heard two explosions outside the Stade de France stadium. Police officials confirmed one explosion occurred at a nearby bar. Officials have not yet provided any casualty reports related to the explosions.

It’s not clear yet who might be behind the attacks, but France has suffered from several terrorist incidents in recent years, including the coordinated attacks on satirical newspaper Charlie Hebdo and a Jewish grocery store in January that left 20 people dead. In August, three Americans helped thwart an attempted attack on a high-speed train headed for Paris.

The restaurant involved in tonight’s attack is in the same general neighborhood as the Charlie Hebdo offices.

The attacks occurred at a time when local law enforcement officials are on heightened alert ahead of the world climate conference scheduled to begin in Paris later this month.

The Associated Press contributed to this report.