Police Minister Senzo Mchunu is set to appear before the Madlanga Commission of Inquiry in Pretoria on Tuesday.
The Commission is probing KwaZulu-Natal Police Commissioner Nhlanhla Mkhwanazis allegations that senior police officials, including Mchunu, are corrupt, have links to criminal syndicates and interfere in policing operations.
Mchunu, who is on a leave of absence, has dismissed the allegations as baseless.