A teenager is reported missing after drowning near a dock in Kepungoda, the Police Media said.
The drowning victim has been identified as an 18-year-old from Minuwangoda area.
Dungalpitiya Police and divers of Sri Lanka Navy have launched a rescue mission in search of the missing teenager.
According to reports, he had been bathing in the water with three other peers when the incident took place.
One of them who also drowned has been rescued and is receiving treatment at the Negombo Hospital.