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Production remains at a standstill at Goodyear in Uitenhage.
The company says despite progress last week with national and regional Numsa leadership, an agreement has not yet been concluded.
Goodyear says the plant opened today for non-Numsa affiliated employees to return to work.
Spokespeson, Lize Hayward, says no production is taking place, however product distribution had resumed from the warehouse situated at the plant.
Workers downed tools following a dispute over a relief allowance.