A 50-year-old man is believed to have been injured after reports of a helicopter crash in the Kosciuszko National Park.
NSW Ambulance paramedics are responding to the incident with a initial report indicating the aircraft was on fire.
The extent of the man's injuries were currently unknown.
A number of paramedic units were responding, including a rescue helicopter.
It is anticipated the patient will have to be winched out due to the difficult terrain, which is also hampering communications.
The patient is understood to have two other people with him on-scene, a NSW Ambulance spokesperson said.
They are not believed to have been in the helicopter.
- Neighbours hear screams, smell fuel: Chilling details from deadly house fire
- Police search CCTV for clues of bushfire arsonist
A doctor and paramedic have now been dropped on scene by helicopter and are treating the man.
The rescue helicopter has landed nearby on Lobs Hole Ravine Road. It is understood to be near the southeastern shore of Lake Talbingo.
A helicopter winch will be attempted in about 30 minutes.
It is expected the man will be taken by helicopter to Canberra Hospital.