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Metal workers union Numsa says striking automobile workers will march to Naamsa's offices in Pretoria on Tuesday.
Union spokesperson, Castro Ngobese says the march will be led by the union's national treasurer, Mphumzi Maqungo who will hand-over a memorandum of demands to the Automobile Manufacturers Employers' Organisation.
The strike in the automobile sector has entered its third week.
Employers have offered a 10% increase, which the union has rejected.
The National Association of Automobile Manufacturers of SA said in a statement on Monday that one of the negative consequences of the strike was that it undermined South Africa's status as a reliable supplier to international export markets.
Naamsa warned that this could negatively affect future export contracts.