The 13-year-old was attempting to fire the weapon when he was struck by part of it in the ribcage, according to the Maricopa County Sheriff’s Office.

— @SgtJEnriquez (@SgtJEnriquez) October 26, 2015 Authorities found the boy after receiving a call that a juvenile had been shot just after 4 p.m. local time (7 p.m. ET) in Buckeye, Arizona. The injured teen was airlifted to a local children’s hospital for surgery. His condition was unknown early Monday.