Goldminers in South Africa have called a strike over their wage demands, to start on Tuesday. The National Union of Mineworkers has demanded rises of up to 60%.
Earlier this week, union members rejected an offer of increases of about 6% - the same as the current annual rate of inflation.
The Chamber of Mines said South Africa's biggest goldmining companies - AngloGold Ashanti, Gold Fields, Harmony Gold and Sibanye - as well as several smaller operators have been served with a formal strike notice.
The BBC reports South Africa is already grappling with strikes by car, construction and some aviation workers. Petrol station employees also intend to begin industrial action next week.