OTTAWA—The movement of cargo through Canada’s second-largest seaport halted late Sunday after dockworkers at the Port of Montreal rejected a revised pay offer from employers, heightening stresses on trade as talks aimed at reopening ports on the ...

The employers' association at the Port of Montreal has issued the dockworkers' union a "final, comprehensive offer," threatening to lock out workers at 9 p.m. Sunday if a deal isn't reached.

Longshoring activity at the Port of Montreal is set to grind to a halt as an employers’ group locks out 1,200 union members.