Iraqi officials say the blast struck a convoy and killed the governor, Khaili Jalil Hamza, and the police chief, Major General Khalid Hassan, in the town of Ajaf today.
A driver and a bodyguard were also killed.
The convoy was heading to the provincial capital Al-Diwaniyah, which has been the scene of clashes pitting U.S. and Iraqi forces against Shi'ite militias.
(AP, AFP)