The raid on Mahumapelo's offices came as pressure was mounting on another of Zuma's erstwhile backers, former water affairs minister Nomvula Mokonyane, with parliament's public accounts committee summoning her to appear before it.
Mokonyane, who was recently moved by President Cyril Ramaphosa to the communications portfolio, is accused of having "collapsed" the water affairs ministry during her tenure.
Themba Godi, who heads the parliamentary committee, has publicly said he did not understand why Ramaphosa kept Mokonyane in cabinet when there were allegations of maladministration and corruption levelled against her.
During yesterday's raid, the Hawks were seen leaving Mahumapelo's office and finance department with boxes of documents.
Hawks spokeswoman Captain Tlangelani Rikhotso said several documents which would assist in the ongoing probe were seized from different offices.
She said the corruption allegations related to a contract given to an IT company Nepo Data Dynamics which was appointed by the office of the premier to procure services on behalf of government.