Johannesburg - Cosatu in North West on Wednesday queried Lanxess chrome mine's move to suspend some workers after a recent strike at the Rustenburg mine.
"The management, jointly with [NUM], signed an agreement on this matter, including the removal of disciplinary cases against all workers who were part of the strike," said provincial secretary Solly Phetoe.
Work resumed at Lanxess on Monday after workers went on strike to demand that they receive part of a performance bonus they believed they were entitled to.
The Congress of SA Trade Unions said management and the National Union of Mineworkers had signed an agreement on ending the strike, which included the removal of disciplinary cases.
But Lanxess said nine employees were suspended for engaging in alleged unlawful activities.
"Evidence found on security video footage revealed that the employees were involved in acts of intimidation, inciting other employees, destroying property or being violent," spokesperon Sibonile Dube said in a statement.
"The suspensions, which are pending investigation, will go through the necessary internal disciplinary steps and legal processes where appropriate."
In the settlement agreement, Lanxess reserved its rights with regards to the illegal strike.
"Executing disciplinary action against violent strikers is therefore not in violation [of] the agreement," Dube said.