The Welikada prison riot was a prison riot that occurred on 9 November 2012 at Welikada Prison in Sri Lanka. The riot broke out during a search for illegal arms. The riot left 27 people dead and 40 injured. The government has appointed a committee to investigate the riot. Welikada Prison, which has around 4,000 prisoners, has witnessed a number of violent riots in its history. This prison riot was the worst in Sri Lanka's history since the 1983 riot, also at Welikada Prison, which left 53 prisoners dead.