A suspect was arrested in connection with shooting in which a 32-year old man was killed at Pallimulla in the Panadura North Police division on Monday, the Police said.
The victim who was heading towards Panadura in a three-wheeler with two others was shot at by two gunmen who came in a motorbike wearing full face helmets and jackets.
Police Spokesman DIG Ajith Rohana said three police teams have been deployed to arrest the other suspect.
He said the arrested would be detained for further questioning.
Meanwhile, four suspects were arrested in connection with another murder that took place in Meetiyagoda on Sunday, where an individual was hacked to death by a gang.