MILWAUKEE -- A 26-year-old woman died after witnesses say a child in the back seat of her car shot her.

The Milwaukee County Sheriff's Office says they found the driver pulseless and not breathing when they arrived. She was pronounced dead at the scene.

The incident happened on Milwaukee's Highway 175.

"Initial witness accounts indicate that a child in the back seat of the vehicle got ahold of a gun and discharged the firearm, sending a single bullet into the driver's back," a statement from the Sheriff's Office reads.