At least 19 of 23 inmates who were killed in a bloody prison revolt were suspected Abu Sayyaf militants blamed for some of the Philippines' worst terror attacks, prosecutors said yesterday. Police stormed the maximum-security jail in a hail of gunfire Tuesday, ending a 29-hour standoff that started when suspected Abu Sayyaf guerrillas attacked guards, then took over the facility when their escape plot fizzled, officials said.Grieving relatives on Wednesday buried the 22 Muslim inmates in a mass grave in a large Muslim community in Manila's Taguig suburb. Their bloody remains were not cleaned and were wrapped in white cloth — a local practice that indicated they were regarded as martyrs. Prosecutor Aristotle Reyes said 19 had been charged and detained in connection with kidnappings and bombings. Three of the dead inmates were suspected commanders of the Al-Qaeda-linked Abu Sayyaf. "These rebels would have been convicted just the same because of overwhelming evidence and their identification by witnesses," Reyes said. It was not clear what charges had been brought against the other four who died, including three Muslims. An Abu Sayyaf leader still at large, Abu Sulaiman, has warned of revenge, leading police to tighten security that already was high after a trio of deadly bombings a month ago.