Police say a 10-year-old boy fired a semiautomatic handgun inside a New Jersey elementary school as he was showing it to a friend. Linden Lt. Raymond Tyra says no one was injured in the gunfire at School Number 2 in Linden on Wednesday afternoon. The boy was showing the .38-caliber gun to his friend in a coat closet when the weapon went off. A bullet passed through the wall and into the classroom next door, where it lodged in a wall. Tyra says most of school's students had gone home before the incident.