KPMG has been losing clients after its own investigation last month found flaws in work it did for the tax collection agency and the Gupta family, wealthy businessmen accused of using their friendship with President Jacob Zuma to win government contracts.

The Guptas and Zuma deny wrongdoing and say they are victims of a politically motivated witch-hunt.

(Reporting by Tiisetso Motsoeneng; Editing by James Macharia)