Former Free State MEC Mxolisi Dukwana is set to appear before the judicial commission of inquiry into allegations of state capture on Friday.
He is likely to testify about his, ANC secretary general Ace Magashule and the Guptas' role in the failed "City for Tomorrow" project in 2011 from which the Guptas had allegedly planned to net R80m.
On Tuesday, state capture inquiry investigator Patrick Mlambo testified about security upgrades at various politicians' homes, including ANC chairperson and Minister of Mineral Resources Gwede Mantashe.
Mlambo told inquiry chairperson, Deputy Chief Justice Raymond Zondo, that he received a call from Mantashe who was unhappy about a site visit to his property without his permission.
He said Mantashe indicated that he would fire his employee for giving permission for the inspection of his property in Elliot in the Eastern Cape.
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