Union workers at Volvo Group owned Mack Trucks went on strike on Monday morning after overwhelmingly rejecting a proposed five year contract deal, the United Auto Workers told Reuters, making it the latest tentative labour agreement to be voted down.

About 73% of workers – covering 4,000 workers in Pennsylvania, Florida and Maryland – voted against the deal, the UAW told the news agency.

The UAW has been on a targeted strike against Detroit Three automaker factories since 15 September. About 25,000 of the 146,000 UAW employees at General Motors, Ford and Chrysler parent Stellantis are on strike.