IRAQI SHIA MILITANTS USING IRANIAN IED

"The most lethal weapon directed against American troops in Iraq... is known as an “explosively formed penetrator”... being used by Shiite groups... The link... to Iran is based on... analysis of captured devices, examination of debris after attacks, and intelligence on training of Shiite militants in Iran and in Iraq by the Iranian Revolutionary Guard and by Hezbollah militants..."

"... Only a small fraction of the roadside bombs used in Iraq are explosively formed penetrators... (but) “It is the most effective I.E.D out there,” said Lt. Col. James Danna.... “To me it is a political weapon. There are not a lot of them out there, but every time we crack down on the Shia militias that weapon comes out. They want to keep us on our bases, keep us out of their neighborhoods..."

http://www.nytimes.com/2007/02/10/world/middleeast/10weapons.html?pagewanted=2&ei=5094&en=e9a9ae56cb1df98a&hp&ex=1171170000&partner=homepage