Once the soldiers in the room were isolated they proceeded to capture two U.S. soldiers, 1LT Jacob Noel Fritz and CPT Brian Scott Freeman. They pulled two more soldiers, PFC Shawn Patrick Falter and SPC Jonathan Bryan Chism out of an armored humvee at the entrance. One soldier, PVT Jonathon Miles Millican, died and three were wounded when a grenade thrown by insurgents exploded in the barracks room on the first floor of the building. Three U.S. humvees were damaged by separate explosions in the raid. No Iraqi policemen or soldiers were injured in the raid, as the insurgents specifically targeted the U.S. soldiers in the compound. At approximately 18:00, the insurgents broke off the attack and left the compound with their prisoners, heading east toward neighbouring Babil province. Shortly after crossing the Euphrates River, the militants, who were then being followed by U.S. attack helicopters, shot their four captives and abandoned five vehicles along with uniforms, equipment, and a rifle. Three soldiers were found later by Iraqi police with gunshot wounds to their chests near Bu-Alwan, a village close to Mahawil. Three were already dead (two handcuffed together in the back of one of the SUVs and the other on the ground) and the fourth showed up at nearby hospital with a gunshot wound to the head. On the day of the attack, the U.S. military reported only that five soldiers were killed while "repelling the attack." The full details of the attack, including the militants' penetration of the PJCC compound and the capture of four of the five soldiers, were not released until a week later. Four individuals suspected of participating in the raid were detained on January 22 by U.S. troops and Iraqi security forces. The mastermind behind the attack, Azhar al-Dulaimi, was killed on May 18 by U.S. forces. According to two unnamed U.S. officials, the Pentagon is examining the possibility that the raid was supported or conducted by Iranians. In a speech on 31 January 2007, Iraqi Prime Minister Nouri al-Maliki stated that Iran was supporting attacks against Coalition forces in Iraq and some Iraqis suspect that the raid may have been perpetrated by the Islamic Revolutionary Guard Corps's Qods Force in retaliation for the U.S. raid on the Iranian Liaison Office in Erbil on 11 January. In response to such speculations, Hassan Kazemi Qomi, the Iranian ambassador to Iraq, "ridiculed evidence the U.S. military claimed to have proving Iranian involvement in planning attacks on U.S. and Iraqi forces."