Authorities say a 12-year-old girl from Marathon County has died in a go-Cart accident over the weekend in Marinette County. The Marinette County Sheriff’s Office says the accident was reported just before 3 P-M Saturday on private property in the Town of Grover. Deputies say the girl was operating the go-kart when she struck a parked pickup. Sheriff’s officials say the girl was taken to an Oconto hospital with shoulder and internal injuries. Several hours later, authorities were notified that she had died from complications of internal injuries. The victim has been identified as Madison Pluger of Spencer. Investigators say she was visiting her grandmother and family where the accident happened. The accident remains under investigation.