JOHANNESBURG - The Association of Mineworkers and Construction Union (Amcu) on Friday said it was concerned about killings at mines.
Union president Joseph Mathunjwa put forward a R200,000 reward for anyone with information regarding the killings.
The union is accusing police of dragging their feet.
Amcu Member Mahamba Ngomti said: "Even president Mathunjwa has put forward R100,000, which he’s raised to R200,000 for anyone who’ll come forward and say I saw so and so killing people. He will be given that money.
"This shows there is something being done, using Amcu resources, not the governments," he added.