NUM says one of its members has been stabbed to death on his way to work at an Amplats mine, the fifth such killing in the past two weeks.
Thailand’s army has taken control of government two days after its general declared martial law on the protest-hit country.
US President Barack Obama has announced the deployment of about 80 military members to Chad to help find over 200 kidnapped Nigerian schoolgirls.
The US has sent more marines and aircraft to Naval Air Station Sigonella in Sicily after gunmen stormed Libya’s Parliament over the weekend.
Nigerian President Goodluck Jonathan and leaders from neighbouring countries have gathered to forge a regional strategy against the Islamist group.
The NUM says its members will not return to work at the platinum mines until "conditions are safe and the intimidation" by Amcu stops.
As miners prepare in the hope that workers will return to the shafts in defiance of their union, more police have been sent to the platinum belt.
The National Union of Mineworkers says two miners have been killed while on their way to work, while another – and his wife – was killed in his home.
A Federal Reserve official said he expects the US economy to start picking up in the second quarter.
Pro-Russian regions Luhansk and Donetsk are voting in referendums to gauge support for self rule.