Police yesterday arrested three persons for the possession of a firearm and a hand grenade. The arrest took place in Kadewatta, Weligama.
Police also took into custody a locally manufactured revolver and five T-56 rounds of ammunition.
Police said at the time of arrest, the suspects were intending to rob a businessman in Denipitiya.
It is also revealed that two weeks ago, the suspects had been released on bail.
They had been remanded over a burglary and various other offences.