U.S. NATIONAL INTELLIGENCE ESTIMATE: IRAN NOT A MAJOR ROLE IN IRAQ WAR

"... The NIE, which has been six months in preparation and represents the consensus views of the vast US intelligence community, also stressed that the violence in Iraq is internally generated and sustained, refuting recent suggestions by senior Bush administration officials that Iran is playing a major role in support of Shi'ite militias..."
http://www.atimes.com/atimes/Middle_East/IB06Ak02.html