U.S. Capitol Police on Tuesday arrested some 200 people protesting against U.S. military aid for Israel inside the congressional Cannon House Office Building.

Police said protesters violated a law against “crowding, obstructing, or incommoding,” adding that “demonstrations are not allowed inside the Congressional Buildings.”

“We told the people, who legally entered, to stop or they would be arrested. They did not stop, so we are arresting them,” added police.