The raid on the Limpopo premier's office by the elite police crime investigating unit, the Hawks, last Friday was not authorised by its high command and that all confiscated documents have since been returned.
Hawks national spokesperson Brigadier Hangwani Mulaudzi confirmed to News24 on Monday that certain issues were identified concerning the raid.
"Those are internal affairs that we are going to deal with. There are procedures that have to be followed before a raid can take place. There were some issues that we picked up on Friday that we need to attend to," Mulaudzi said.
However, he denied that documents seized during the raid have been returned.
"That there were challenges we picked up [concerning the raid] does not mean the investigation has stopped."
Last Friday, about 20 members of the Hawks arrived unannounced at the office of the premier to conduct a raid to collect evidence relating to large-scale corruption with regard to international trips taken by officials, including Premier Stan Mathabatha.