San Joaquin County sheriff's officials Thursday evening were looking for a 15-year-old boy suspected of firing a shotgun during an argument with his father at their Ripon home.
The shotgun blast struck a wall, and some debris hit the boy's aunt, said deputy Les Garcia, a sheriff's spokesman.
He said the aunt suffered some minor cuts. She was examined by medics at the scene, but did not require hospitalization. The boy's name was not released because he is a minor.
The shooting occurred about 12:45 p.m. in the 17000 block of Colony Road, just southeast of Colony Oak Elementary School.
The boy fired the shotgun, but he was not aiming at anyone, Garcia said. The boy's aunt was in another room on the other side of the wall that was hit by the shotgun blast.
The boy and a 15-year-old friend ran from the home. Garcia said it wasn't clear whether the boys left with the shotgun, which had not been recovered.
Sheriff's officials, Ripon police and the California Highway Patrol created a perimeter and searched for the boys. Colony Oak Elementary was locked down as a precaution.
The authorities searched nearby neighborhoods and orchards but did not find the boy. Garcia said the boy could face charges, but it will be up to his aunt to press charges or the district attorney's office to file criminal charges.