The attack, the deadliest on US troops in Iraq in more than two years, comes months before US forces are slated to exit. The Pentagon has signaled time is short for Iraq to request that troops remain.
US troops are scheduled to leave Iraq by Dec. 31, but Prime MInister Maliki said he is considering seeking an agreement that would allow them to stay longer.
Iraq claims to have the world's second-largest oil reserves, but 1 in 6 Iraqis live in poverty. Protests have already forced three provincial governors to resign.
Amid the volatile Arab Spring and ongoing security threats in Iraq, top US military officials have expressed openness to keeping troops on the ground past the Dec. 31 deadline for withdrawal.
Prime Minister Nouri al-Maliki said he may extend the Dec. 31 withdrawal deadline if at least 70 percent of Iraq's political leadership back the idea.
A United Nations statement issued late Saturday said it expected an Iraqi government inquiry into the Iraqi military's deadly April 8 raid on a People’s Mujahideen Organization of Iran (PMOI) camp to be independent.
Hardline Shiite cleric Moqtada al-Sadr rallied thousands of followers Saturday. Their message: United States civilians as well as troops must leave by the end of the year.
Iraq's coalition government has yet to fulfill Iraqi hopes and is on increasingly shaky ground. Iyad Allawi pulled out of a powersharing deal this weekend.
Pro-democracy warriors in Middle Eastern countries such as Libya, Egypt, and Tunisia push through barriers of fear only to find a constellation of needs, demands, and problems on the other side.