Gardaí and emergency services attended the scene of the incident involving a vehicle at a sporting event.
A female teenager (13) who was driving the vehicle was pronounced deceased at the scene.
Her body has been removed to Cork University Hospital, a post-mortem will take place in due course.
The scene is being preserved for technical examination.
Gardaí are appealing for witnesses to this incident to come forward.
Anyone who may have camera footage and were attending the event between 3pm and 4pm are asked to make this footage available to investigating Gardaí.
Anyone with information is asked to contact Bandon Garda Station on (023) 8852200, the Garda Confidential Line on 1800 666 111, or any Garda Station.
