Crowds hurl bottles and other objects at police, smash marquees, jump on vehicles, break windows and light a small fire along Figueroa Street. At least one person is beaten unconscious.
Hundreds of officers in patrol cars, on foot and on horseback moved in to clear streets and break up the crowds. At least 12 people were arrested for crimes including public drunkenness, vandalism and inciting a riot.
One person was arrested for assault on a police officer, authorities said.Several dozen people rushed onto the 10 Freeway near Figueroa and Washington boulevards, disrupting traffic, the California Highway Patrol said.