Ottawa police have arrested dozens of people and begun towing vehicles that have blockaded the centre of the Canadian capital for three weeks, as a large contingent of officers moved in to clear the area.
Dozens of police vehicles, including a large black armoured car, and about 100 police officers arrived near the Ottawa Art Gallery at about 8am (13:00 GMT) on Friday, where about 20 vehicles have been parked since late January, blocking the roadway.
