As shown in this video, U.C. Berkeley students trying to set up an Occupy encampment faced a violent altercation with campus police, who arrested seven protesters and tore down tents along the campus’ Sproul Plaza Wednesday afternoon.

The police, wearing riot gear, clashed with students again Wednesday evening as they attempted to reestablish their camp.

The Berkeley students were gathering as part of a statewide ‘Occupy’ effort to unite against the cost of California’s higher education system. Chancellor Robert Birgeneau sent a letter to members of the campus Monday warning against engaging in such demonstrations.