Tens of thousands of Volkswagen workers are taking part in strikes at plants across Germany Monday, marking the largest walkouts at the carmaker’s domestic operations since 2018.

Volkswagen plants saw workers go on warning strikes on Monday as tensions over changes to labor agreements and potential factory closures escalated.

Workers at Volkswagen plants across Germany walked off the job in waves on Monday for temporary work stoppages, marking the start of nationwide strikes against the German auto giant. About 66,000 VW employees - more than half of VW's factory workforce in Germany - joined the strikes,