Authorities say a one-vehicle crash in Fayette County killed two people and injured two others. Emergency crews were dispatched to the scene on Route 40 in Redstone Township at about 4:45 a.m. Wednesday. No details were immediately available about the circumstances of the crash, which occurred in the southbound lanes. Initial reports were that a car had gone over a hillside between Colvin Run Road and Grindstone Road. The two people injured were taken to a hospital, but there was no immediate information about their conditions.