South Africa's top manufacturing union NUMSA said that 600 workers out of 1,500 at General Motors (GM) - Get Report will lose their jobs by July after the automaker's decision last week to sell its local operations, Reuters reports.

The move received a lot of criticism from the labor union.

The National Union of Metalworkers of South Africa said in a statement that GM had confirmed the numbers and issued lay-off notices as required by law.

Shares of GM are slightly higher in premarket trading this morning.

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