Initial reports said that around 100 houses were buried in the incident and some people sustained injuries.
The residents of the area have been protesting over the past several months urging the authorities to move the garbage to another location.
A fire had also broken out at the site and the Air Force was deployed to douse the flames.
President Maithripala Sirisena instructed the Disaster Management Centre to provide assistance to the affected families. (Colombo Gazette)