http://www.washingtonpost.com/wp-dyn/content/article/2006/04/07/AR2006040701719.html?referrer=email&referrer=email
"Threat of Shiite Militias Now Seen As Iraq's Most Critical Challenge
By Jonathan Finer
Washington Post Foreign Service
Saturday, April 8, 2006; A01
BAGHDAD, April 7 -- Shiite Muslim militias pose the greatest threat to security in many parts of Iraq, having killed more people in recent months than the Sunni Arab-led insurgency, and will likely present the most daunting and critical challenge for Iraq's new government, U.S. military and diplomatic officials say.
Assassinations, many carried out by Shiite gunmen against Sunni Arabs in Baghdad and elsewhere, accounted for more than four times as many deaths in March as bombings and other mass-casualty attacks, according to military data. And most officials agree that only a small percentage of shooting deaths are ever reported......
....While acknowledging the instability caused by Shiite armed groups, the largest of which are linked to the country's dominant political parties and operate among Iraq's police and army, U.S. and Iraqi officials here have yet to implement, or even publicly articulate, a strategy for addressing the problem....
....Practically every Shiite political party in Iraq maintains a force of men with guns -- some virtual armies of several thousand or more, others what Peterson described as little more than a "neighborhood watch on steroids."
Iraq's other major factions maintain armed forces as well. Insurgent groups such as al-Qaeda in Iraq and Ansar al-Sunna are composed predominantly of Sunni Arabs and conduct frequent attacks on U.S. and Iraqi soldiers and Shiite civilians. The pesh merga , a large militia maintained by ethnic Kurds, is formally under the command of the Iraqi army, operates mainly in the Kurdish north and poses no major security threat, U.S. officials say."