"I clearly heard them say 'It's the fault of (French President Francois) Hollande, it's the fault of your president, he should not have intervened in Syria'. They also spoke about Iraq," said Pierre Janaszak, a radio presenter.
Attack described as 'bloodbath'
A French radio reporter who was inside the Bataclan theatre that came under attack Friday gave a harrowing account of the "10 horrific minutes" when black-clothed gunmen wielding AK-47s entered and fired calmly and randomly at hundreds of screaming concertgoers.
"It was a bloodbath," Julien Pearce, a reporter for France's Europe 1 radio station, told CNN.
"People yelled, screamed and everybody lying on the floor, and it lasted for 10 minutes, 10 minutes, 10 horrific minutes where everybody was on the floor covering their head(s)."
"We heard so many gunshots and the terrorists were very calm, very determined and they reloaded three or four times their weapons and they didn't shout anything. They didn't say anything."
Pearce recounted seeing 20 to 25 bodies.
US gets behind France
President Barack Obama condemned as an "attack on all of humanity" a wave of bombings and shootings in Paris on Friday that prompted increased security in New York and Washington.
"Those who think that they can terrorize the people of France or the values that they stand for are wrong," Obama said in a hastily convened appearance before reporters at the White House, as the death toll surged past 120 and US sports venues ramped up security.
"We are reminded in this time of tragedy that the bonds of liberte, egalite, fraternite, are not just the values French people share, but we share," he said, citing France's national motto.