by Matthai Kuruvila, Demian Bulwa, Carolyn Jones,Kevin Fagan from sfgate.com;Oakland police clashed repeatedly with Occupy activists Tuesday, firing tear gas canisters and flash-bang grenades at several hundred protesters near City Hall in brief but volatile skirmishes that escalated as quickly as they dissipated.Some protesters shoved against police lines with black shields bearing an "A" for anarchy. Some threw objects at officers, surrounded police cars and pounded on them. In one case, a protester dressed in black threatened an officer with a pole.But many protesters remained peaceful, throwing flowers at the cops' feet or marching peacefully with children in the Fruitvale District, vowing to avoid the violence downtown.read the entire article ==>> CLICK HEREPolice fire tear gas at Occupy Oakland protesters

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