It happened around 9 p.m. at St. Paul's Parish Octoberfest and Carnival at McLean Avenue and McCollum Place.
Police say a 2002 Jeep was exiting the parking lot of Coyne Park when it struck three occupied vehicles, four pedestrians, and two parked vehicles before coming to a stop.
One of the pedestrians, a 15-year old girl, was pronounced dead at a local hospital.
A second, a 12-year old girl, is listed in critical condition.
The two others, both 13-year old girls, were treated for minor injuries.
According to police, the driver of the Jeep remained at the scene and was interviewed by detectives. No charges have been filed at this time.