keywords: insurgents iraqis soldiers ap zarqawi
text: Zarqawi Group Claims Killing of 50 Iraqis (AP) AP - In their boldest and deadliest ambush yet, insurgents waylaid three minibuses carrying U.S.-trained Iraqi soldiers heading home on leave and massacred about 50 of them  #151; forcing many to lie down on the ground and shooting them in the head, officials said Sunday.