(AP) _ One of Iraq's prominent leaders, Abdul-Aziz al-Hakim, died in Iran on Wednesday after his health deteriorated while he was being treated for lung cancer. He was 59. Two senior clerics from his party, Sheiks Humam Hamoudi and Jalaleddin al-Saghir, told The Associated Press that he died after being hospitalized in critical condition in Tehran. In a brief announcement, Iranian state television also reported that al-Hakim died from lung cancer. Al-Hakim was head of the Supreme Islamic Iraqi Council. Al-Hakim was diagnosed with lung cancer in May 2007 after tests at the prestigious University of Texas M.D. Anderson Cancer Center in Houston. He chose to receive his chemotherapy treatment in Iran.