Police clashed with antigovernment protesters in Ottawa on Saturday, pushing deeper into the national capital and closing in on the heart of the site where demonstrators have been encamped since late January. Rows of officers clad in riot gear and carrying batons massed along Wellington Street near the Prime Minister's Office in downtown Ottawa on Saturday morning. Interim police chief Steve Bell says officers came in with batons and helmets to clear the crowds, which he said have been aggressive toward police.