The United Auto Workers union (UAW) is escalating its fight with some of America’s biggest carmakers by taking strike action at dozens of parts distribution centres across the US.
UAW boss Shawn Fain said the new walkouts would hit 38 sites owned by General Motors and Stellantis, as the row over pay and benefits continues.
The move excludes Ford, which the UAW said was making more progress in talks.
The UAW declared a strike against the three carmakers last week.
Mr Fain warned that the expansion of the action could lead to delays for customers needing repairs and said he hoped it would raise pressure on the firms to agree new labour contracts.