Beginning of this year, French firefighters were protesting for better working conditions and a rise in risk pay.
They also protested for a better job recognition and of the risks they are confronted with everyday.
Finally they were blocking roads in response to an increasing number of human attacks and sabotages against them.
Not sure what happened here to cause this level of escalation but the protesting firefighters were setting off fire crackers.
In another incident near Nation, Paris, firefighters were dispersed by water cannon.