(Portland, OR) -- A juvenile was arrested following a shooting outside of a basketball game at Portland's Franklin High School on Saturday evening. A Portland Police officer was working an overtime detail at the game and heard the gunfire outside. Other officers responded and found evidence of gunfire in the parking lot. One juvenile was grazed by a bullet but didn't go to a hospital. A semiautomatic handgun was seized. Police stopped another juvenile away from the school. The boy was charged with a previous warrant and a new charge of Unlawful Possession of a Firearm. The investigation continues.