One of two South African mining unions has declined to sign a deal with Lonmin, continuing a strike that sprang to international attention after police used violent measures that cost 34 miners their lives last month. The National Union of Mineworkers signed the deal with the platinum producer, but the Association of Mineworkers and Construction Union held out, declining to give details on why. More than 3,000 striking miners marched past the mine on Wednesday. South Africa’s government has attempted to intervene in the ongoing labor dispute.