Julius Malema barred from addressing South Africa miners
Firebrand politician Julius Malema has been barred by police from addressing striking workers at South Africa's Marikana mine.
Some 2,000 miners had gathered at a stadium near the mine, about 60 miles (100km) north-west of Johannesburg.
Strikes have already halted production at several gold and platinum mines in the resource-rich country.
South African President Jacob Zuma said that the disruption had cost the industry $548m (£337m) in lost output.