Canada ordered striking dock workers back to the ports of Vancouver, Prince Rupert and Montreal on Tuesday to clear out more than a week of container congestion bound for the United States and Canada.

Workers are locked out at Canada’s two biggest ports on Monday, after Montreal longshore employees rejected a contract with their employers group on Sunday night. Dock workers at British Columbia’s ports, including Vancouver, have been locked out since last Monday as employers push them to approve to a new collective agreement.

Canada’s labor minister said Tuesday he is intervening to end lockouts at the country’s two biggest ports. Labor Minister Steven Mackinnon said the negotiations have reached an impasse and he is directing the Canada Industrial Relations Board to order the resumption of all operations at the ports and move the talks to binding arbitration.

Canada’s Labor Minister, Steven MacKinnon, has taken decisive action to end the recent labor disruptions affecting key ports in Vancouver, Prince Rupert, and Montreal. By invoking federal powers, MacKinnon has ordered binding arbitration between the labor unions and port owners,