Germany's IG Metall union on Sunday called for new strikes on Monday in its ongoing wage dispute.
The so-called warning strikes will take place at targeted locations in the states of Hesse, Thuringia and Rhineland-Palatinate, the union said.
The union, which represents metal and electric industry workers, have called for an 8% pay increase.
(Reporting by Tom Sims;Editing by Elaine Hardcastle)