Violence at South African mines creating uncertainty in the industry . Police fire tear gas as striking miners protest . Last year , thousands of striking workers halted operations at many of the country 's mines . Score: 6 The unrest has prompted some investors to look at alternative options .
Violence at South African mines creating uncertainty in the industry . Last year , thousands of striking workers halted operations at many of the country 's mines . Score: 6 The unrest has prompted some investors to look at alternative options .