Several units have launched investigations into the explosion reported at a hotel in Kapparatota, Weligama this morning.
Police Media Spokesman Senior Superintendent of Police Nihal Thalduwa said the Government Analyst is due to arrive at the scene as well.
The explosion was reported in the kitchen of the hotel around 3.45am.
Police said the 35-year-old owner of the hotel, his 14-year-old son and a 31-year-old woman from a neighbouring house sustained injuries and were admitted to the Matara General Hospital.
Police officers of the Southern Province Crimes Division and the Weligama Police have launched investigations into the incident.