Anti-Wall Street demonstrators march in Oakland

Police in Oakland, Calif, are using flash bang canisters and tear gas to disperse hundreds of people who made their way back to City Hall where an Occupy Wall Street encampment was dismantled earlier in the day.

Hundreds of protesters gathered at a library Tuesday evening and marched through downtown Oakland. They were met by police officers in riot gear, and several small skirmishes broke out.

The march comes after police earlier swarmed into an encampment firing tear gas and rounds of bean bags before removing about 170 demonstrators who had been staying overnight on a plaza outside City Hall for more than two weeks.

City officials say 85 people were arrested, mostly on suspicion of misdemeanor unlawful assembly and illegal camping.