Get latest articles and stories on World at LatestLY. A group of miners from an unregistered, rival union are holding around 500 of their colleagues underground for the second day at a gold mine in South Africa over a union dispute. Some 15 miners have been injured in scuffles, the head of the mine said on Tuesday. World News | Miners from a Rival Union Hold Hundreds of Colleagues Underground at a Gold Mine in South Africa.