An ATV accident in Spencer County has left an 11-year-old girl dead. According to media partner 14News, Indiana Conservation Officers are investigating the death of Kate Bruggenschmidt of Warrick County. Officials say the accident happened around 11:25am Sunday in Rockport. She was driving an ATV on private property with a friend. They were going up a hill when Kate lost control and the ATV overturned. Her friend, 11-year-old Karlee Frobeter, was able to pull Kate out from under the vehicle and call for help. Bruggenschmidt was pronounced dead by the Spencer County Coroner. Officials say neither girl was wearing a helmet.