Police Media Spokesman Senior Superintendent of Police Jaliya Senaratne said the arrests were made based on a tip off received by the Police Narcotics Bureau in Kandy.
Based on information received when questioning a suspect arrested in Wennappuwa with 360g of heroin, Police arrested another suspect last night from the same area for the possession of 2kg and 232g of heroin.
Police found 13kg and 405g of heroin at a house in Kirimetiyana, Wennappuwa.
Police have arrested two suspects adjacent to the Wanawasala Train Station, for the possession of 500g of heroin worth more than Rs.5 million.
Meanwhile Police also arrested another suspect in Keselwatta, Colombo for the possession of 100g of heroin worth Rs.1 million.
The Office of the Senior Deputy Inspector General of Police of the Western Province said two suspects were arrested for the possession of 600g of Cannabis and 50g of ICE from Panadura and Dehiwala respectively.