(UPDATE) A French police official says at least 100 people have been killed inside a Paris concert hall where attackers seized hostages. The hostage-taking was one in a series of at least six attacks across the French capital.

Two Paris police officials say security forces have ended their assault on a concert hall filled with hostages, killing at least two attackers. Neither official could be named, citing ongoing operations throughout the city.

One official described “carnage” inside the building, saying the attackers had tossed explosives at the hostages. Both officials said they expected the toll of victims to rise.

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The deadliest violence in France in decades has left about three dozen people dead at multiple locations in Paris.

Two police officials say that at least 35 people have been killed in shootings and explosions. A police official says about 100 people were taken hostage at a Paris theater.

A Paris police official said there were at least 100 hostages in a Paris theater following shooting and explosions at two sites in the city. Multiple officials, including one medical official, put the number of dead at between 35 to 40 people.

U.S. Homeland Security Department officials monitoring the attacks in Paris say there is no known, credible threat against the United States. DHS officials are in contact with their foreign counterparts amid reports of multiple shootings and explosions in Paris.

A White House official says President Barack Obama has been briefed on the attacks in Paris. President Obama called the Paris attacks an ‘outrageous attempt to terrorize innocent civilians. Obama is slated to travel to Paris at the end of the month to attend a United Nations conference on climate change.

Hundreds of people spilled onto the field of the Stade de France stadium after explosions were heard nearby during a friendly match between the French and German national soccer teams. A stadium announcer made an announcement over the loudspeaker after the match, telling fans to avoid certain exits “due to events outside,” without elaborating. At first that prompted some panic, but then the crowds just walked dazed, hugging each other and looking at their phones for the latest news of the violence. Many appeared hesitant to leave amid the uncertainty after France’s deadliest attacks in decades.