Canada’s labor minister said Tuesday he is intervening to end lockouts of workers 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 of Vancouver and Montreal and move the talks to binding arbitration.

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.