RAPID CITY, S.D. (AP) — Authorities say a police officer has shot and killed a man after he took a gas station clerk in South Dakota hostage with a knife. KELO-TV reports that Rapid City Chief of Police Don Hedrick said that the suspect entered the gas station Friday and held a knife to the clerk’s throat, fending off a bystander’s efforts to intervene. The suspect then brought the clerk outside with the knife still held near her. In a release sent Friday evening, the Attorney General’s Office said that the suspect refused commands to surrender before he was shot. He died later at a hospital.