Authorities in Stillwater say a 00-year-old man has died after being shot at a house party near the Oklahoma State University campus.Stillwater police say they received a call shortly after midnight Sunday from several OSU students who were at a party where Alexander Vierling had been shot in the head. Police say witnesses indicated the shooting occurred as a guest at the party was handling a pistol they believed was a toy.The Tulsa World reports Vierling was transported to Stillwater Medical Center and was later transferred to an Oklahoma City hospital, where he died after being taken off life support.Police Capt. Randy Dickerson says the shooting remains under investigation, and police have not released any information about the alleged shooter. No arrests have been made.