PONTIAC, Mich., May 7 (UPI) -- Police said a Michigan concealed weapons teacher accidentally shot a student in the face during a demonstration.Investigators said the 74-year-old teacher accidentally discharged a bullet from a .38-caliber Smith and Wesson revolver at about 4:30 p.m. Tuesday during a class in Oakland County, WDIV-TV, Detroit, reported Thursday.The bullet ricocheted off a table and struck a 52-year-old student in the face. The student was taken to Troy Beaumont Hospital to receive treatment for non-life threatening injuries.The teacher told investigators he thought the gun was loaded with plastic bullets.Police said the shooting is being treated as accidental and no charges have been filed.