JOHANNESBURG – Lonmin’s Marikana mine on Tuesday said workers at 13 of its shafts in the North West embarked on an unprotected and illegal strike.

Employees arrived at work earlier, but refused to go underground.

It is understood they are angry over the murder of the Association of Mineworkers and Construction Union (Amcu) regional chairperson Mawethu Stevens who was gunned down on Saturday at a local tavern.

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