A 13-year-old boy was arrested after sheriff's officials said he brought a gun to San Marcos Middle School Monday.
San Diego County sheriff's officials said deputies were called to the school Monday after a student told school administrators that a classmate had a gun in his backpack.
Sheriff's officials said the boy admitted to having an unloaded .22-caliber handgun in the bag.
Deputies arrested the boy and booked him into Juvenile Hall.
According to sheriff's officials, it doesn't appear that any threats were made against the school.