Three suicide bombers penetrated the governor's compound in Afghanistan's largest southern city Saturday, killing at least five police officers in the latest multi-pronged attack in the Taliban's spiritual birthplace. The three bombers were able to get past a first security checkpoint in the governor's compound, and one bomber exploded himself at a second checkpoint, said Ahmad Wali Karzai, the president's brother and the head of Kandahar's provincial council. The two other bombers moved deeper into the compound before police fired on them and their explosives detonated, Karzai said. At least five police died in the attack and nine people were wounded, hospital officials said. The Kandahar governor was not harmed, but officials were searching for a possible fourth suicide bomber, Karzai said.