MILWAUKEE, Wisconsin -- A young child sitting in the backseat of a vehicle managed to get hold of a gun and fired a shot that killed the 26-year-old woman driving, according to reports.

The Associated Press reports the woman was struck once in the back as she drove on U.S. 41/Highway 175 at about 10:30 a.m. Tuesday. Rescue workers responding to the scene were unable to revive her.

Authorities did not release the age and gender of the child and the relationship with the woman, the Milwaukee Journal Sentinel reports. They also did not say what type of weapon was involved or whether the child was in a car seat.

One witness tells WTMJ Channel 4 that there appeared to be more than one child in the back seat of the car. None of the children were injured, reports say.

"I saw a blue sedan that had its door open and it was stopped in the middle of the freeway. And I saw a body lying outside of that," Brandon Glass tells WTMJ.

Investigation into the shooting is ongoing, reports say.

A similar incident occurred in Florida in early March. Jamie Gilt, 31, of Jacksonville, Fla., was shot in the back while driving after her 4-year-old son got hold of handgun kept in the vehicle.

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