The federal labour minister posted Sunday on X that "there has been no such evidence to date" that the parties have "sufficiently modified their respective positions."

The latest move from Canada Post comes after the union filed an unfair labour practice complaint with the Canada Industrial Relations Board over the layoffs of striking employees, saying the layoffs are an intimidation tactic that violates the Canada Labour Code.

The Canada Post strike, now two weeks in, has cost the small- and medium-sized business sector at least $765 million or $76.6 million each business day. At this rate, if the strike is not immediately resolved, it will have cost the sector over $1 billion as of Wednesday, warns the Canadian Federation of Independent Business (CFIB).

The move by the United States Postal Service comes after some 55,000 Canada Post workers walked off the job more than two weeks ago.

The Canadian Union of Postal Works says there's been no word from the mediator that talks in the labour dispute with Canada Post will resume.

Canada Post has presented the union representing some 55,000 striking postal workers with a framework to reach negotiated agreements, the corporation said.