Amy Amila, a disciple of leading organized criminal Kalu Sagara, has been arrested by the STF.
The suspect was arrested during a raid carried out in the Danketiya area in Tangalle based on a tip-off.
At the time of arrest the STF had found 3,780 mg of heroin and an illegal sword in his possession.
He is a wanted criminal with charges of murder as well as robbery and assault against him.