An Afghan official says a gunman shot and killed an acting police chief and a civilian in the southern Uruzgan province.

Dost Mohammad Nayab, spokesman for the provincial governor, said Sunday that Gen. Gulab Khan was killed late the night before outside the police headquarters in Tiran Kot, the provincial capital. The civilian killed in the attack was Khan's guest.

Nayab says a police officer suspected of involvement in the shooting has been arrested.

Khan was previously head of the criminal investigation department and was appointed acting police chief after the former police chief was killed in a suicide attack in Kabul last month.