A cease-fire deal between Mr. Sadr's representatives in the Iraqi government and members of the leading Shiite bloc aims to end weeks of fierce battles in Sadr City.
A cease-fire deal to end seven weeks of fighting in Sadr City could provide the clearest test yet of just how much sway the anti-American Shiite cleric Moqtada al-Sadr has over armed militants operating inside his sprawling bastion of support in Baghdad.
The truce, accepted by Prime Minister Nouri al-Maliki Saturday after being negotiated between the United Iraqi Alliance of ruling Shiite political parties and representatives of the Mr. Sadr's movement, is supposed to end the daily fighting that has claimed more than 1,000 lives in the vast Shiite slum.
The agreement allows government security forces to enter any part of Sadr City to arrest anyone with heavy weapons such as mortars and rocket launchers. Sadr has said his Mahdi Army militia is a defensive necessity, but that it does not use heavy weapons.
The truce was hastily reached as Mr. Maliki's government announced a new offensive in Mosul against forces affiliated with Al Qaeda in Iraq. Maliki has said since January that he would take the fight against Al Qaeda to the northern Iraqi city of Mosul, believed to be the group's last urban stronghold in Iraq. Some Iraqi government officials have suggested that Maliki wanted the battle with Shiite militias quieted before the Mosul offensive.
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