The Police said the husband of the owner of the vehicle was also arrested.
A gun battle erupted in the Matara town on June 22 between the Police and a group of robbers in which a policeman was killed and three people were injured.
The gun battle erupted when a gang attempted to rob a jewellery store in the Matara town.
Three policemen and a civilian were injured in the shooting and were admitted to hospital.
One policeman succumbed to his injuries in hospital.
The main suspect who was arrested was later shot dead by the Police following a confrontation when he attempted to attack the Police, the Police had claimed. (Colombo Gazette)