Meanwhile, fighting between the unions closed the world’s biggest platinum mine, Impala Platinum’s Rustenburg operation, for six weeks this year when four people were killed.
Mokwena said the Western Platinum operation had not been shut but was working at reduced capacity because many of the workers were afraid to report for duty.
“The police are on site and we have asked them to do a security assessment of the situation,” he said. Lonmin’s shares fell by 11p, or 1.46%, to 742p.