An Afghan official says a suicide bomber driving a motorcycle has killed four civilians and a police officer in southern Kandahar city. Gen. Abul Razaq, Kandahar provincial police chief, says Tuesday's attack also wounded 16 people, including three police officers and six children. Razaq says the bomber detonated his explosives at a police checkpoint. Kamal Shah, a doctor at Kandahar city's Mirwais Hospital, confirmed the casualty count, according to a report of the Associated Press.