http://www.msnbc.msn.com/id/17103722/site/newsweek/<snip>
According to the briefers, it was the use of EFPs by another Iranian-supported group, Lebanon’s Hizbullah, that led American military officials to suspect a possible Iranian link. Hizbullah has used EFPs against the Israeli Army in southern Lebanon repeatedly in the late '90s. In Iraq, they are used by splinter factions of the Shiite Mahdi Army, or "rogue JAM" in military shorthand, which have allegedly been assembling and planting the explosives. The officials also noted that they had been used by the "Shaybani network," a group run by a former commander of the Badr Brigade called Abu Mustafa Shaybani. The intelligence analyst said that Shaybani no longer had links to the Badr Brigade, a rival Shiite group to Moqtada al-Sadr’s Mahdi Army that has now renamed itself the Badr Organization and has members in the Iraqi Parliament. Shaybani, these officials claimed, is currently in Iran and lives with members of the Iranian Revolutionary Guard Corps (IRGC), specifically the Qods Force.
The officials zeroed in on the Qods Force as the "enabler of violence." "(The Qods Force) really report directly to the Supreme Leader," the senior defense analyst said at the briefing. This had led the U.S. military to conclude that the campaign was being orchestrated at "the highest levels of (the) Iranian government." Recent U.S. military raids in Baghdad have nabbed top members of the IRGC. Disclosing some of the details of these raids, the briefers said that last Dec. 21,
Mohsen Chizari, allegedly the No. 3 man in the IRGC, was pulled out of a compound linked to the Supreme Council for the Islamic Revolution in Iraq (SCIRI), the top Shiite party in the government. Chizari was later freed when it was proven that he had a diplomatic passport. The defense analyst told the briefing that there were no dubious ties between the Qods Force and members of the Iraqi government, but the senior defense official seemed to contradict that assertion by noting that soldiers found a long list of weapon inventories at the SCIRI compound--including sniper rifles and mortars, items that he called "offensive-type armament."
http://www.washingtonpost.com/wp-dyn/content/article/2006/12/29/AR2006122901510.html<snip>
One of the commanders, identified by officials simply as Chizari, was the third-highest-ranking official of the Iranian Revolutionary Guards' al-Quds Brigade, the unit most active in aiding, arming and training groups outside Iran, including Hezbollah and Islamic Jihad, U.S. officials said. The other commander was described as equally significant to Iran's support of foreign militaries but not as high-ranking.
...
The Iraqi government decided to honor Tehran's claims that the two detainees had diplomatic immunity. U.S. officials had argued that although the men had diplomatic passports, they were operating under aliases and therefore not immune.
Despite their frustration at the release of the Iranians, U.S. officials said a strong message has been sent to Iran that its operatives will be tracked down and that it will be held accountable for its activities in Iraq.
"Iranians have been pushing the envelope in Iraq and elsewhere, and it's a good thing they learn there are consequences," a U.S. official said, on condition of anonymity.