GREAT MILLS, Md. (AP) — A student with a handgun shot two classmates inside his Maryland high school Tuesday before he was fatally wounded during a confrontation with a school resource officer, a sheriff said. The officer and the student both fired a single shot at that point, and it wasn't immediately clear whether he took his own life or was killed by the officer's bullet, St. Mary's County Sheriff Tim Cameron said. The other students — a 16-year-old girl and a 14-year-old boy — were hospitalized, the girl with life-threatening injuries.