BAGHDAD, Iraq - Gunmen ambushed and killed an Iraqi police chief as he drove to work Saturday, police said. Lt. Col. Rahim Ali, the chief of police in the town of Iskandariyah, south of Baghdad, was killed immediately in the 9 a.m. attack, said Lt. Ali Obeid, a police officer in the town. Insurgents have targeted Iraqi officials and police whom they accuse of collaborating with U.S. forces. In February, an insurgent suicide bomber explosed a truck bomb outside a police station in Iskandariyah, killing 53 people.