CARSON CITY, Nev. — A Carson City teenager has been arrested after sheriff deputies say he admitted shooting his 4-year-old brother in the head with a BB gun.

The Carson City sheriff’s office said Tuesday the younger boy was in critical but stable condition at UC Davis Hospital in California with a BB embedded in his brain.

His 13-year-old brother was charged Monday with battery with a deadly weapon causing substantial bodily harm.

Detectives say family members initially told investigators that juveniles in the neighborhood were playing with an airsoft or BB gun when a ricochet struck the little boy.

But when deputies returned to the Airport Road residence with a search warrant later Monday the 13-year-old told them what happened and admitted he and a cousin hid the weapon in the garage.

He’s being held at the Carson City Juvenile Detention Center.