From Gawker: Oakland Police Fire Tear Gas on Protesters:

The Occupy Oakland encampment in Frank Ogawa Plaza—renamed Oscar Grant Plaza by its new residents—was kicked out by Oakland police using smoke grenades on Tuesday morning over what authorities claimed were “sanitary and public safety concerns.” At least 75 people were arrested in the process, and protesters say three were hurt. “I think we allowed people to exercise their rights to free speech and free assembly,” OPD Chief Howard Jordan told reporters.

Protests bring out the best and worst of Police executives and our big city governments. They really do.