65 197(21) The state, police, and military agents used war weapons, explosives, tear gas, vomiting, and paralyzing bombs against the inmates, from the start of the operation.50 The bullets and grenades used would fragment upon impact with the walls, injuring many inmates with splinters.51 Snipers were located on the roofs and windows of the other pavilions.52 During the development of the “operative” police officials, officers of the specialized units UDEX, SUAT, USE, DINOES, and officials of the Peruvian army participated.53 197(22) Between 9:00 and 9:30 hours of May 6th the National Police introduced grenades, white phosphorous gas bombs, and tear gas bombs in pavilion 1A, which produced asphyxia, and a burning feeling in the respiratory system, eyes, and skin of the inmates. Even though at the beginning the inmates used pieces of cloth with vinegar to resist the gases thrown in the closed spaces of the pavilions attacked, when the vinegar was finished they had to use their own urine for this purpose.54 197(23) At 10:00 hours the inmates of pavilion 4B started a protest for the attack on their female prison mates; the police reacted by shooting at them.55 7, 1992 (dossier of appendixes to the petition, appendixes 45, 46, 47, and 48, folios 1024, 1031, 1047, 1053, and 1056). 50 Cfr. Final Report of the Commission for Truth and Reconciliation, CVR, issued on August 27, 2003, in the city of Lima, Peru, Volume VII, section 2(68), Extrajudicial killings in the criminal center Canto Grande, page 786 (dossier of appendixes to the petition, appendix 6, corresponding to a compact disc); judgment issued by the National Terrorism Chamber of the Supreme Court of Justice of Peru on February 3, 2004 (dossier of appendixes to the petition, appendix 274, folios 3225 through 3228); and written testimonial statement of Mr. Pascual Utia Lozano (dossier of appendixes to the petition, appendix 130, folio 1724). 51 Cfr. Written testimonial statements of Elmer de la Cruz Yarma, Gerardo Saravia López Castilla, Alberto Atunca Acevedo, and Nina Soria Alvarado Ruiz (dossier of appendixes to the petition, appendixes 124, 126, 129, and 104, folios 1674, 1691, 1715, and 1430), and written expert report offered by José Quiroga (dossier on the merits and possible reparations and costs, volume VII, folio 2148). 52 Cfr. Written testimonial statements of Yuri Vanessa Conde Beltrán, Marisol Morán Cascire, Gertrudis Silva Breuery, Elena Alvarado Rojas, Hernán Collazos Rojas, and Pastor Cocha Nevado (dossier of appendixes to the petition, appendixes 88, 91, 97, 211, 222, and 246, folios 1286, 1305, 1371, 2411, 2501, and 2733); and testimonial statement offered by Luis Ángel Pérez Zapata in the public hearing before the Inter-American Court held on the 26th and 27th days of June 2006. 53 Cfr. Judgment issued by the National Terrorism Chamber of the Supreme Court of Justice of Peru on February 3, 2004 (dossier of appendixes to the petition, appendix 274, folio 3225); order for preliminary proceedings to commence issued on June 16, 2005 by the Second Supraprovincial Criminal Court (dossier of appendixes to the respondent’s plea, folio 5395); and Final Report of the Commission for Truth and Reconciliation, CVR, issued on August 27, 2003, in the city of Lima, Peru, Volume V, section 2(22), The Prisons, page 703 (dossier of appendixes to the petition, appendix 6, corresponding to a compact disc). 54 Cfr. Different statements of surviving inmates and the next of kin of surviving and dead inmates (dossier of appendixes to the petition, appendixes between 82 and 241, folios between 1226 and 2642); Final Report of the Commission for Truth and Reconciliation, CVR, issued on August 27, 2003, in the city of Lima, Peru, Volume VII, section 2(68), Extrajudicial killings in the criminal center Canto Grande, page 772 (dossier of appendixes to the petition, appendix 6, corresponding to a compact disc); testimonial statement offered by Gaby Balcázar Medina in the public hearing before the Inter-American Court held on the 26th and 27th days of June 2006; and written testimonial statements offered by Madelein Escolástica Valle Rivera and Miriam Rodríguez (dossier on the merits and possible reparations and costs, volume VII, folios 2019 and 2008). 55 Cfr. Final Report of the Commission for Truth and Reconciliation, CVR, issued on August 27, 2003, in the city of Lima, Peru, Volume VII, section 2(68), Extrajudicial killings in the criminal center