The Criminal Investigations Department has arrested Prisons Commissioner Emil Lamahewa over the killing of prisoners during the riots at the Welikada Prison in 2012. 

Lamahewa was the Superintendent at the Welikada Prisons at the time the riots broke out. 

IP Neomal Rangajeewa, an officer attached to the Police Narcotics Bureau, has also been arrested over the same incident. 

The riot broke out during a search for illegal arms and the incident left 27 people dead and 40 injured.

The government also appointed a committee to investigate the riot and the committee has submitted its report to the state authorities.