Stephen Farrell in the  New York Times:

Silent Gunmen Killed People in the Bataclan, Witness Says:

“They didn’t shout anything, they didn’t say anything. They were wearing black clothes and they were shooting at people on the floor, executing them. I was luckily at the top of the stage, on the front of the stage.”

[Witness, radio reporter, Julien Pierce in an interview with CNN, November 14, 2015.]

But another witness contradicts this flatly, see People’s Pundit Daily, “Witness To Paris Attack: Gunmen Shouted Allahu Akbar,” November 13, 2015:

“A witness named Louis, who was in the Bataclan, told France Info radio that the men opened fire and shouted “Allahu Akbar.”