The riot broke out during a search for illegal arms, reports Xinhua news agency.
The government had appointed a committee to investigate the riot and a report was compiled on the incident but it was not made public.
In January, the Human Rights Commission in Sri Lanka (HRCSL) recorded a statement from journalist Kasun Pussewela over the riot.
Pussewela sought an investigation into the incident, saying there was ample evidence to prosecute those who were responsible for killing prisoners and taking part in the violence.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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Doraiah Chowdary Vundavally is a Software engineer at VTech . He is the news editor of SocialNews.XYZ and Freelance writer-contributes Telugu and English Columns on Films, Politics, and Gossips. He is the primary contributor for South Cinema Section of SocialNews.XYZ. His mission is to help to develop SocialNews.XYZ into a News website that has no bias or judgement towards any.