1990 Strangeways Prison riot April, HM Prison Durham, HM Prison Winchester and HM Prison Wandsworth on 4 April, and HM Young Offenders Institute Glen Parva on 6 April. The weekend of 7 April and 8 April saw protests across the prison system. At HM Prison Leeds there was a sit-down protest after the arrival of over 100 prisoners who had been transferred from Strangeways. At HM Prison Dartmoor, between 100 and 120 prisoners wrecked D wing of the prison, and 12 prisoners also protested on the roof of C wing unfurling a banner that read "Strangeways, we are with you". 32 prisoners from Dartmoor
2012 Welikada prison riot the searches. The police have defended their actions, saying "By killing the prisoners who were armed, we prevented a much bigger disaster". Minister of Rehabilitation and Prison Reforms Chandrasiri Gajadeera announced on 10 November 2012 that he had appointed a three-member committee to investigate the riot. A second investigation is to be carried out by Prisons Commissioner General P. W. Kodippili. The opposition has described the riot as a massacre and called for a parliamentary select committee to investigate the riot. Civil rights groups have also called for an independent investigation. The Asian Human Rights Commission has condemned the authorities