MERIDIAN, Miss. (AP) — Prison officials say a corrections officer has been shot and killed by a colleague outside a Mississippi prison. Authorities were notified of a shooting in the parking lot of the East Mississippi Correctional Facility in Lauderdale County on Tuesday afternoon. Lauderdale County Sheriff-Elect Ward Calhoun told WTOK-TV that both guards were on duty at the time. The private company that runs the facility said in a statement that one of the guards was pronounced dead at the scene and that the other was arrested. Neither has been identified by authorities.