The union representing longshore workers at the Port of Montreal began a three-day strike at two terminals. The strike is expected to last until Thursday morning.

The walkout at one of Canada’s biggest seaports comes as workers at more than half of U.S. ports prepare to strike.

The job action Monday morning closed facilities that handle about 40% of container traffic on the St. Lawrence Seaway

Last Friday, the Syndicat des débardeurs du port de Montréal filed a 72-hour strike notice, saying its members who work at the Viau and Maisonneuve terminals intended to walk out from 7 a.m. Monday to 6:59 a.m. Thursday.

If you thought the largest port in eastern Canada could pick up the slack for shuttered US ports, think again, at least for now. Workers at the Port of Montreal went on strike on Monday, just hours before their counterparts at America’s East Coast and Gulf of Mexico terminals were scheduled to do the same.

Longshore workers at Montreal’s port launch a 72-hour strike, affecting two terminals and causing significant supply chain disruptions across Canada.

The 72-hour partial strike by dockworkers is expected to take place Monday morning. The Maritime Employers Association (MEA) announced that it had not reached an agreement with the union representing longshoremen at the Port of Montreal.

(Reuters) -Unionized workers have begun a three-day strike at two terminals of the port of Montreal as talks over a new contract are yet to result in a labor agreement, the Canadian port's authorities said on Monday.

Two terminals at the Port of Montreal could be paralyzed next week, as the Syndicat des débardeurs du port de Montréal (Port of Montreal Longshoremen’s Union) filed a 72-hour strike notice on Friday – which could lead to a walkout starting Monday morning.

The port of Montreal on Friday said customers would experience an operational slowdown after a union issued a notice for a three-day strike next week at two terminals that account for 41% of its container traffic.