The Latest on a North Florida woman who told deputies her 4-year-old son accidentally shot her in the back while riding in the rear seat of their pickup truck. (all times local):

1:00 p.m.

Sheriff's investigators say they're trying to determine how a 4-year-old boy had access to a gun he used to shoot his mother as she drove a pickup truck in north Florida.

The shooting happened Tuesday afternoon.

Putnam County Sheriff's spokesman Joseph Wells says 31-year-old Jamie Gilt of Jacksonville owns the gun.

A deputy saw her behaving frantically inside the truck, which was stopped partially in the road. The deputy then saw she'd been shot in the back.

Wells says Gilt told deputies her son had accidentally shot her. She was taken to a hospital, but her condition wasn't available Wednesday.

Wells says investigators haven't been able to interview her.

It is a misdemeanor under Florida law for someone to store or leave a loaded gun where a child has access.

The boy is with relatives. The Florida Department of Children and Families is also investigating.

___

9:10 a.m.

A north Florida woman told deputies her 4-year-old son shot her in the back while he was sitting in the back seat of her pickup truck.

A Putnam County Sheriff's Office news release says a deputy saw 31-year-old Jamie Gilt of Jacksonville behaving frantically inside the truck Tuesday afternoon and quickly realized she'd been shot.

The release says the woman told deputies her son accidentally shot her. He wasn't harmed and was reunited with family members. The Department of Children and Families will investigate.

Deputies say a .45-caliber handgun was on the truck's floor.

Gilt was taken to a Gainesville hospital, where she was in stable condition later Tuesday.

The truck, which was hauling a horse trailer, was partially parked in the road when the deputy stopped.

Authorities are investigating.