MEDFORD, Ore. (AP) — A federal grand jury has indicted an Oregon man who authorities fear may have been plotting a sniper attack on a high school football game.The indictment filed Friday in U.S. District Court in Medford charges 26-year-old Raphael Enrique Amoroso, of Grants Pass, with two firearms counts. One alleges he took a loaded .45-caliber pistol onto the grounds of Grants Pass High School. The other alleges he is an illegal marijuana user in possession of firearms.He is scheduled to be arraigned Monday.A judge ordered Amoroso held without bail after the prosecution argued that the case raised red flags suggesting he posed a danger to the community. Authorities cited a novel about a sniper attack on a football game found in his car, guns seized from his home and car, and past behavior.