Port of Montreal dock workers are set to walk off the job for four days next week as negotiations over a new labour contract drag on. Dockers have been without a labour agreement since Dec. 31, 2018. Negotiations had resumed recently after a ruling by the Canada Industrial Relations Board on essential services to maintain in the event of a strike. Work will cease Monday at 7 a.m. and resume Friday at 6:59 a.m. Union officials have sent a 72-hour notice confirming their intention to strike. The walkout will also affect operations at the port’s Contrecoeur terminal.