Fiji police appear to suspect that members of the force played a role in the break-in at the Criminal Investigations Department in Suva.
FBC News says there is an internal investigation following a directive from the Police Commissioner who reportedly wants both immediate arrests and the recovery of stolen items.
Police have reportedly been unable to confirm if they were working at the time of the raid.
They have declined to say what was stolen but FBC News says it has been told that drugs were involved.
The Fiji Sun says it has been told that cocaine was taken from the exhibit room.