Police in Los Angeles arrested four people on Monday after Occupy Wall Street protesters camped outside City Hall defied an eviction deadline.
At least 1000 people flooded into the area around City Hall Park before a deadline of midnight Sunday.
By 5am, police said those blocking streets would be arrested, but those staying in the park would not.
The BBC reports hundreds of police wearing helmets and batons lined the streets, but there were no confrontations.
Arrests were made after a few protesters refused to leave an intersection.
The Occupy LA camp began on 1 October, shortly after the initial protest in New York City.
The camp inside the park eventually grew to some 485 tents, but about half were taken down before the deadline.
At a press conference on Monday, Police Chief Charlie Beck said that midnight was the official time the camp would become illegal.
