Protesters demanding faster access to AIDS treatments were arrested by police Tuesday as they attempted to take over the headquarters of the Food and Drug Administration in an act of civil disobedience.

Police officers, wearing surgical gloves and helmets, rounded up hundreds of demonstrators and herded them into buses, Montgomery County police said. Some protesters blocked the buses from leaving for 20 minutes."Hey, hey, FDA, how many people have you killed today?" chanted the crowd, estimated by protest organizers at between 1,100 and 1,500. The protesters hoisted a black banner that read "Federal Death Administration."

The AIDS activists shut down the large facility by blocking doors, walkways and a road, as FDA workers reported to work for the day. Police told some workers to go home rather than wade through the throng.