French authorities have called for calm after clashes between protesters and police in the city of Nantes.
The violence broke out overnight after an officer shot dead a 22-year-old driver who was trying to avoid a police checkpoint.
Interior minister Gerard Collomb condemned the violence.
Protesters in Nantes clashed with police, throwing Molotov cocktails and burning cars and rubbish bins. They also set fire to shops and buildings in three poor neighbourhoods across the city.