Iraq's most powerful Shiite leader Abdul Aziz al-Hakim died after his health deteriorated while he was treated for lung cancer at a hospital in Tehran, Iraqi official television reported on Wednesday.
Hakim, 56, was diagnosed with lung cancer in May 2007 after medical tests in the United States, but he favored to receive treatment in Iran.
Hakim is a prominent Shiite theologian and politician, who headed the Supreme Iraqi Islamic Council (SIIC), the largest political party in the Iraqi parliament.
After the U.S.-led invasion in 2003, Hakim became a member of the U.S.-appointed Iraqi Governing Council and served as its rotating presidency in December 2003.
In August 2003, he replaced his brother Mohammed Baqir al-Hakimas the leader of the SIIC Shiite party, then named the Supreme Council for the Islamic Revolution in Iraq after Mohammed Baqir was assassinated in Najaf.