A suicide bomber detonated his car on Monday at the gate of the home of the leader of Iraq's biggest political party, killing nine people and injuring 39, police said. The cleric was unharmed. Abdul Aziz al-Hakim, head of the Supreme Council for the Islamic Revolution in Iraq - the country's most powerful Shiite political group - was in his residence in Baghdad's Jadiriyah district when the attack occurred, said his spokesperson, Haitham al-Husseini. "It was a suicide attack near the gate leading to the office," al-Husseini said. "Several of the guards were killed and wounded."Hakim also heads the candidate list of the 228-member United Iraqi Alliance coalition, which is expected to dominate Iraq's new constitutional assembly following the first free elections on January 30. The coalition is supported by Iraq's top Shiite cleric, Grand Ayatollah Ali al-Sistani. Al-Hakim's son, Ammar, accused Saddam Hussein's followers and their allies of being behind the suicide attack. "They are the remains of the dead regime and their allies who carried out similar criminal acts in the past," he said, adding many of the victims were innocent civilians who happened to be on the street when the explosion occurred. The residence, where Hakim has his home and offices, was previously the house of Tariq Aziz, a jailed former senior aide to Saddam Hussein who has been in prison since April last year. In August 2003, a suicide bomber killed Ayatollah Mohammed Baqir al-Hakim, elder brother of Abdul Aziz and former leader of the Supreme Council for the Islamic Revolution in Iraq.