When did the black miners riot? [originaltext] 13,000 black miners rioted Th

13,000 black miners rioted Thursday night at two gold mines in western Transvaal Province. Police used tear gas against the miners, who threw stones at cars and buildings in Dryfontein and Bufulsfontein, and about 7000 miners re- fused to go to work on Friday. The dispute is said to involve wages for black miners in South Africa.