Tensions are rising at Eskom, with the struggling South African electricity supplier confirming protests at a number of power plants following a breakdown in wage negotiations. Groups at six coal-fired stations “have blocked roads leading to some of the power stations, which hampers the movement of people and goods into or outside of the facilities,” spokesperson Sikonathi Mantshantsha said in a text message on Thursday. “While some incidents of intimidation have been reported, the protesters are largely peaceful at this stage.”