France's interior minister has been jostled and jeered in the northern French city of Amiens where rioters have clashed with police.
Manuel Valls was in the city to hold meetings with officials after two nights of violence in which buildings and cars were set on fire.
Seventeen police officers were injured in Monday's clashes with dozens of youths, some of whom used live rounds.
A hundred extra police officers have been sent to Amiens as reinforcements.
Boos and curses A group of about 100 young men greeting Mr Valls as he arrived at the town hall, accompanied by security guards.
"Calm down! Calm down!" he shouted as the crowd booed and cursed him.