MILWAUKEE (AP) - Relatives say a woman was fatally shot in the back by her 2-year-old son as she drove in Milwaukee.

Antonio Price says investigators told him his sister Patrice was driving with her two sons, ages 1 and 2, riding in the backseat Tuesday when she was shot. Price says investigators told him the older boy fired the gun.

He says his mother was in the passenger seat and was not struck.

Milwaukee County sheriff's officials haven't identified the victim, but say a 26-year-old woman was shot once in the back while driving on Highway 175.

Price says his sister was a great mother and always gave him good advice.

The woman's father, Andre Price, says his daughter was driving her boyfriend's car when she was shot. He said the boyfriend is a security guard and left his gun in the vehicle.