Antioch girl accidentally shoots herself in hand with found gun

Antioch Police are investigating the gun incident. Antioch Police are investigating the gun incident. Photo: File Photo / San Francisco Chronicle Archives Photo: File Photo / San Francisco Chronicle Archives Image 1 of / 1 Caption Close Antioch girl accidentally shoots herself in hand with found gun 1 / 1 Back to Gallery

A 13-year-old Antioch girl was arrested on suspicion of weapons-related charges after she accidently shot herself in the hand with a gun she said she found in a school bathroom, city officials said.

Around 7:30 p.m. on Wednesday, officers responded to Sutter Delta Medical Center in Antioch where the girl was being treated for the injury, according to a report from Acting City Manager Ron Bernal. The teen told officers she had found the revolver in a school bathroom then placed it in her backpack, where she kept it all day. The report did not provide the name of the school.

When she returned home, “she was going to show the firearm to her grandmother and accidently shot herself in the hand,” according to the report.

Officers recovered the gun from the her home and booked her at a junevile hall. The girl already had an arrest record as well as a pending juvenile case.

Police are investigating the weapon’s ownership and how the middle school student secured a gun.

Jenna Lyons is a San Francisco Chronicle staff writer. E-mail: jlyons@sfchronicle.com Twitter: @JennaJourno