Police fired stun grenades and tear gas at Occupy Oakland protesters who threw rocks and hurled canisters back in an overnight confrontation on the downtown streets.
A fire lit up the scene where the anti-Wall Street demonstrators lingered after a day when thousands rallying to protest economic inequality shut down the busy Port of Oakland but failed to bring the Northern California city to a halt.
Hundreds of police in riot gear advanced in a line and started making arrests. They estimate 60 people were arrested.
The authorities appear to be trying to force protesters from expanding their foothold around a public plaza.
Oakland has become a national flashpoint for the Occupy Wall Street movement after a former Marine was badly injured in a violent clash with police last week.
Bottom line: Police in riot gear clash with Occupy Oakland protesters, firing tear gas to disperse a crowd trying to expand their protest against economic inequality.