Iranian-backed forces supplied insurgents attacking coalition troops and devised new forms of suicide vests for al-Qaeda, according to assessments released by Wikileaks.
Hundreds of documents outline the intelligence, of variable quality, on which the Americans have based allegations of Iranian backing for the Shia militias which fought government and US troops.
They claim Iranian intelligence officers served inside Iraq, at one point manning checkpoints with local militias, and describe a firefight on the border in which American troops shot an Iranian border guard dead and then came under prolonged attack as they returned to base.
