Several testimonies from local Gazan population and from IDF soldiers stated that Hamas operatives donned medic uniforms and commandeered ambulances for fighters transportation.[48][49][50][51] After the Israeli airstrike on the central prison which resulted in prisoners being released into the streets, several of the 115 prisoners accused of collaboration with Israel who had not yet been tried, were executed by Hamas militants in civilian clothes in the Shifa hospital compound.[52] An IDF probe released on April 22, 2009, stated that an incident involving a UN vehicle attacked by the IDF occurred after the IDF identified a Palestinian anti-tank squad disembarking from the vehicle.[49] The Palestinian Authority's Health Ministry accused the Hamas-run government's security services of using several hospitals and clinics in Gaza as interrogation and detention centers, where medical staffers have been expelled, during and after the war.[53] The IDF probe made similar charges and stated that Hamas operated a command and control center inside Shifa Hospital in the Gaza City throughout the War.[54]