BBC
//Police say there has been an escalation of violence in protests against labour reforms over the past two months.
As officers protested in Paris, they were targeted by counter-demonstrators.
Groups say police have themselves acted violently towards them.
As hundreds of police gathered for a rally at the Place de la Republique in Paris on Wednesday, hundreds of the counter-demonstrators defied a ban on marching.
While some chanted "Everybody hates the police" and "Police everywhere, justice nowhere," French media said up to 15 youths attacked a police car with iron bars before throwing a petrol bomb at the vehicle.
Two police officers who were inside the car fled before it was attacked, media said.
Paris prosecutors say they have opened an investigation into attempted manslaughter.//