A man walks past a burnt bus in Taji, north of Baghdad, July 24, 2014. A shooting and bombing attack on a bus near Baghdad killed 52 prisoners and nine policemen on Thursday, Ministry of Justice and ... more 
A man walks past a burnt bus in Taji, north of Baghdad, July 24, 2014. A shooting and bombing attack on a bus near Baghdad killed 52 prisoners and nine policemen on Thursday, Ministry of Justice and medical sources said, the latest in a string of assaults on prisoners in Iraq. The motive for Thursday's killings was not immediately clear but Iraqi security forces and government affiliated Shi'ite militias appear to have unlawfully executed at least 255 prisoners over the past month in apparent revenge for killings by Sunni militants, according to Human Rights Watch. The bus was transporting prisoners from a military base in the town of Taji to Baghdad when it was hit by roadside bombs, the sources said. Gunmen then opened fire. REUTERS/Thaier al-Sudani (IRAQ - Tags: CIVIL UNREST POLITICS TRANSPORT) less 
1 / 29
Reuters | Photo By THAIER AL-SUDANI / REUTERS
Thu, Jul 24, 2014 6:25 AM EDT