Police raids on a number of properties in Victoria have uncovered uranium, a drug laboratory, chemicals and cash.
The raids were connected to the investigation into the leaking of confidential Victorian police documents, which has revealed links between members of Victoria Police and criminals.
Investigators for the Petra Taskforce - initially formed to examine the murders of police informant Terrence Hodson and his wife - uncovered the items during raids on properties at Preston, Bulla, Kangaroo Flat, and Harcourt.
Two Melbourne men aged 42 and 49 were charged with several drugs offences and will return to court at a later date, while a 46-year-old Kangaroo Flat man will face similar charges in the Bendigo Magistrates Court tomorrow.
Police say they are confident they have smashed a well organised syndicate involved in the manufacture and distribution of drugs.
The Office of Police Integrity (OPI) says it is not alleged that police are implicated in the activity which led to today's arrests.
The inquiries into the leaking of police documents are continuing.