Johannesburg - City Power's board will not hesitate to act if Johannesburg Mayor Herman Mashaba's investigation uncovers new evidence of corruption, its chairperson Reverend Frank Chikane said on Thursday."Together with the mayor we are cleaning up corruption," he said.Mashaba confirmed last week that he had launched an investigation into multi-billion rand tenders the municipal entity had handed out. On Tuesday he fired Anthony Still, a member of his mayoral committee after Still told him he could not summarily suspend two City Power executives without first following due process.Chikane thanked Still for his service. He would not comment on the fallout between Still and Mashaba."Still and Mashaba are at party political levels. As the board, we wouldn't get involved."He refused to say whether the board had confidence in managing director Sicelo Xulu."There's no reason to express any view on that matter. He is the MD of City Power. We'll wait for the investigation to be completed then we will act on it.”Chikane announced on Wednesday that he would take legal action against those SA Municipal Workers Union members who claimed City Power had given his wife a tender. He dismissed the corruption claims as malicious.He gave those behind the claims until Monday to retract them and make a public apology.