Emergency services are responding to the scene of a light plane crash in the Upper Hunter region of NSW. The incident occurred at a racecourse, although details regarding the extent of any injuries or the cause of the crash are currently unknown. Authorities have not yet released information about the number of people on board the aircraft. First responders are currently on site, assessing the situation and working to secure the area. The NSW Police Force have confirmed they are investigating the incident, with further updates expected as they become available. The racecourse has been closed to the public until further notice, and investigators will need to determine the cause of the accident. It is currently unknown if the crash impacted any ongoing events at the racecourse.