Portland Police arrest over 50 Anti-Wall Street protestors after a man was shot and killed Thursday.

Police drove hundreds of anti-Wall Street demonstrators from weeks-old encampments in Portland and arrested more than 50 of them, as authorities in Oakland, Calif., warned Occupy campers that a similar crackdown was coming.

Portland police moved in shortly before noon Sunday and forced protesters into the street after dozens remained in the camp in defiance city officials. Mayor Sam Adams had ordered that the camp shut down Saturday at midnight, citing unhealthy conditions and the encampment’s attraction of drug users and thieves.

More than 50 protesters were arrested in the police action, but officers did not use tear gas, rubber bullets or other so-called non-lethal weapons, police said.

Source: Jonathan J. Cooper and Terrence Petty for the Associated Press via Law Officer.