03 individuals were arrested with 52 kilograms of heroin, during a raid carried out by the Crime Prevention Division of the Police Headquarters.
One of the arrestees has been identified as a Sub Inspector attached to the Kalutara South Police Station, said the Police Media Spokesperson.
The suspects will be produced before the court and detained for seven days, while two vehicles used for the drug trafficking were taken into Police custody.
A three-week investigation was conducted after the authorities had received a tip, prior to the investigation.
The arrests were made during a search operation that was carried out in Galle, Hikkaduwa, and Baddegama.