A suspect has been arrested over the Kotahena shooting incident in which two people were killed, the police media unit said.
A group of United National Party (UNP) supporters were shot at in the Kotahena area on July 31, killing one woman and injuring several others.
A second person who was injured in the shooting incident later succumbed to his injuries in hospital.
The UNP supporters were engaged in campaigning activities in support of former UNP MP and Finance Minister Ravi Karunanayake when gunmen travelling in 2 vehicles had opened fire.
The shooting incident claimed the first victims of the 2015 Parliamentary election.