A protest by hundreds of youth activists turned violent early Sunday, with protesters setting fire to street barricades and cars and smashing shop windows, police said. Officers used tear gas to disperse the crowd, according to AP. One officer was injured and 63 people were arrested as riot police clashed with rock-throwing youths in the Noerrebro district of Copenhagen, police said. «Three or four people will be charged for violent behavior against police officers,» said police spokesman Flemming Steen Munch. «The others have been released.» The unrest started after a demonstration late Saturday commemorating the Youth House, a makeshift cultural center for the city's anarchists and disaffected youth that was demolished in March. He said police used tear gas to disperse the crowds who set fires to barricades and cars, including a police vehicle that had been abandoned by officers fleeing the angry mob.