Members of South Africa’s National Union of Mineworkers (NUM) will not return to work at Northam Platinum’s Zondereinde mine until their safety is assured after a spate of murders, a spokesperson for the union said on Tuesday. Northam suspended production at the mine on Monday after a worker was fatally stabbed during a clash between members of NUM and its arch rival, the Association of Mineworkers and Construction Union (AMCU).