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Mahdi Army fighters take positions in Basra, Iraq, Friday, March 28, 2008. Shiite militants clashed with government forces for a fourth day in Iraq's oil-rich south and sporadic fighting broke out in Baghdad, despite a weekend curfew in the capital. (AP Photo/Nabil al-Jurani)
Iraqis chant after prayers, next to a poster of radical Shiite cleric Muqtada al-Sadr in Kufa, Iraq, Friday, March 28, 2008.
Shiite militia leader Muqtada al-Sadr called on Thursday for a political solution to the burgeoning crisis and an end to the 'shedding of Iraqi blood.'
(AP Photo/Alaa al-Marjani)