An 18-year-old South River High School student was charged as an adult Friday on a weapons charge after a shotgun was found in his vehicle at the school, Anne Arundel County Police said.

Police said the student had apparently been hunting previously and did not remove the 12-gauge shotgun from the car afterward. No students or staff were threatened with the shotgun, police said.

Patrick Bryan Mitchel II, of Edgewater, faces charges related to the possession of a weapon after the gun and several loose rounds of ammunition were found. The shotgun was first spotted in the back seat of a vacant car by an administrator who was conducting a routine review of the school's student parking, police said. Mitchell was then pulled from class after school personnel determined it was his vehicle.

Police said they also found two pills not prescribed to the student in the car, and also charged him with possessing a controlled dangerous substance.