WASHINGTON (CBSDC/AP) — U.S. Park Police say an officer has been struck with a brick in the face as officers in riot gear and on horseback cleared protesters from one of the last remaining Occupy sites.

Police spokesman Sgt. David Schlosser says the officer was taken to a hospital Saturday evening for treatment of injuries to his face.

UPDATE: On Monday it was revealed it was a bottle and not a brick that struck the officer.

Protesters have clashed with police as officers pushed them out of the last section of McPherson Square, a park under federal jurisdiction near the White House.

By Saturday afternoon, seven were arrested. Schlosser said more may have been arrested in the most recent scuffle.

VIEW GALLERY: POLICE RAID OCCUPY DC

Police have been clearing away tents they said were banned under park rules. However, they made it clear to protestors they were not evicting anyone, but were instead stepping up enforcement of an existing ban on camping. Officers used barricades to cordon off sections of the park and checked tents for camping gear.

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