Johannesburg - Cosatu North West expressed shock and dismay on Friday about the murder of a National Union of Mineworkers (NUM) branch chairperson at Marikana.
"The Congress of SA Trade Unions [Cosatu] is shocked because these killings continue even after there was a peace agreement facilitated by the deputy president of the country and all parties were involved," Cosatu North West secretary Solly Phetoe said in a statement.
Police said the man was shot eight times.
"The man was gunned down on Thursday night between 7pm and 8pm. He was on his way to visit his girlfriend when four men came out of the bushes and shot at his car," said Brigadier Thulani Ngubane.
He was hit once when he was driving and when he got out of the car, the men fired another seven bullets at him and he died on the scene.
Cosatu believed killings were continuing at Marikana because some organisations were reluctant to sign the peace accord, Phetoe said.
"This shows that they were never committed to bringing peace and stability in the area."
He called on President Jacob Zuma to declare a state of emergency at Marikana because workers were being "killed on a daily basis".
Cosatu sent its condolence to the man's family.
North West Premier Thandi Modise also condemned the "senseless" killing of union members in the area.
She said it could not be allowed to continue.
"We call on police not to leave any stone unturned and also appeal to communities to help them with any information that will ensure that the perpetrators of violence are unmasked and brought to book."
Modise said the killings undermined the Marikana Peace Accord and the Framework for Peace and Stability signed early this year.
The NUM said it was disturbed by the latest killing and urged its members not to be provoked.