It was thanks to information from whistleblowers that the Special Investigating Unit (SIU) obtained warrants for Friday morning's nationwide search and seizure operation at home affairs refugee centres.
The SIU simultaneously raided all five home affairs refugee centres on Friday morning as part of a corruption probe linked to the issuing of asylum and refugee papers to foreign nationals entering South Africa.
News24 was present at the large refugee centre in Marabastad, Pretoria, where more than 60 home affairs officials were understood to have been identified as suspects in the investigation.