WATCH: Video captures first gunshots at Bataclan theater at start of massacre

87 people were killed in the theater in the deadliest of the Paris attacks Friday.

Shooting at Bataclan theater
Islamic State claimed responsibility on Saturday for a coordinated assault by gunmen and bombers that killed 127 people at locations across Paris that President Francois Hollande said amounted to an act of war against France.
In the worst attack, a Paris city hall official said four gunmen systematically slaughtered at least 87 young people at a rock concert at the Bataclan concert hall before anti-terrorist commandos launched an assault on the building. Dozens of survivors were rescued, and bodies were still being recovered on Saturday morning.
Video taken at the concert captured the terrifying first gunshots at the concert of Californian rock group Eagles of Death Metal.
The concert hall is just a few hundred meters from the former offices of the satirical weekly Charlie Hebdo, target of a deadly attack by Islamist gunmen in January.