President François Hollande declared a state of emergency after an unknown number of gunmen opened fire in the crowded eastern part of the capital, stormed a Bataclan concert hall during a packed music performance, and set off explosives at the French national stadium the Stade de France, which was filled to capacity for a France-Germany soccer game—including with Hollande, who was among the spectators. A Paris prosecutor said more than 120 people are believed to have lost their lives.

As of early Saturday morning local time French media was reporting as many as six separate incidents including:

• A hostage siege at the Bataclan concert hall in the 11th arrondissement, which reportedly left as many as 100 dead
• A shooting at a restaurant in the 10th arrondissement, said to have killed 11 people
• Explosions in a bar outside the Stade de France to the north of the city

Around 12.30 a.m. local time police in riot gear stormed the Bataclan concert hall to break the hostage siege. The raid ended shortly after 1:00am, with two attackers dead, according to two police sources interviewed by France24. Multiple media reports suggested at least 100 people were killed inside the concert hall alone.

Chems Akrouf, identified as a military intelligence expert on television channel France24 said: “This is France’s September 11th.” There wasn’t an individual target in these attacks, he said, like the police or journalists as before. “Here it’s everyone… we’re sure that it was an act of terrorism where everyone is afraid and says to themselves, I could be hurt. If their objective was to transmit fear, they succeeded.”

Shortly before midnight, Hollande went on television to appeal for calm and announce his government had shut French borders—a highly unusual move for European Union countries. “We have to be compassionate and we have to be united and keep a cool head. France needs to be strong and the state needs to be strong,” he said. “What the terrorists want is for us to be scared. There are things to be scared about. But in the face of terror we have to be united and we will defeat these terrorists.”

Emergency medics at all hospitals across Paris were called into work shortly before midnight, as the wide scale of casualties became apparent. As the news of the attacks whipped through the city, Parisian taxis switched off their meters on Friday night to ferry people home safely at no cost. Police appealed to people to keep off the streets, on a night when Parisians typically crowd into bars and restaurants to kick off the weekend.

Since January, when jihadists claiming allegiance to the Islamic State of Iraq and Greater Syria (ISIS) and to al-Qaeda in the Islamic Maghreb launched a massacre at the Charlie Hebdo satirical magazine and laid siege to a kosher supermarket, the capital has been on high alert. Early details suggest that Friday night’s attacks were far more sophisticated—and more deadly—than those back in January, which involved three gunmen, and killed 14 people.

Parisians have remained highly jittery since the Charlie Hebdo attacks, continually reminded that terror threats remain. There are the bag searches at the doors of major department stores and public buildings, and uniformed soldiers with semi-automatic weapons patrol train stations and major intersections in the capital. All public buildings, including schools, have had red triangles posted on their front doors since January, denoting the highest state of alert in the country. And just last August, three Americans helped to thwart an armed attack on a packed high-speed train from Brussels to Paris, when they wrestled a gunmen to the ground in the passage of the train car.

Worse still, the capital is just two weeks away from hosting its biggest event in many years—the international negotiations of climate change, which opens on Nov. 30 with a gathering of dozens of world leaders, including President Barack Obama.

In the panic late Friday night, the details broke in spurts. The first details of Friday night’s attacks broke at 9.45 p.m. when word came of a shootout at a restaurant in eastern Paris—a neighborhood that is packed with diners at the weekends. Then came worse: a series of explosions at the packed national stadium.

Hundreds of people scrambled on to the field. One of the spectators, Richard M’Barki, told BFM Television by phone shortly after that he had heard three explosions. “There were not many policemen,” he said on air. “People were badly informed.”

All of the city’s Metro stations closed down, while the education department announced that schools and universities would be closed Saturday:

This story was originally published at Time.com. It has been updated with additional information.