From Zero Hedge:

Update (1615ET): During a Friday afternoon press conference, Interim Ottawa Police Chief Steve Bell told reporters that Ottawa police have made at least 70 arrests (including high profile organizers Tamara Lich, Chris Barber and Pat King) and towed at least 21 vehicles.

Bell said the plan to move in on protesters “methodical” and well thought out, noting officers had control of the situation on the ground.