UPDATE, 5pm: Rescuers have abseiled to the aid of a teenage boy at the bottom of a cliff at Stanwell Tops and are working to winch him to safety.
The boy has a fractured arm, a head injury and possible breathing difficulties. He will be placed in a rigid stretcher and lifted up the cliff face, then transferred to an ambulance rescue helicopter.
Abseiling instructors attached to The Tops Conference Centre were the first to reach the boy, before special operations team paramedics arrived.
Initial reports to the Ambulance Service of NSW were that the boy fell 75-100 metres.
The Mercury understands the boy is conscious and responsive.
3.30pm: Emergency services are attempting to reach a 16-year-old boy who fell off a cliff at Stanwell Tops this afternoon.
A triple-zero caller said the boy fell 75-100 metres into bushland that is difficult to access.
Paramedics were called shortly before 3pm to The Tops Conference Centre, a ‘‘God honouring Christian venue’’ offering conferencing facilities, camping, ministry experiences and instructor-led activities like abseiling and high ropes courses, according to the venue’s website.
Rescuers are abseiling into the site and an ambulance rescue helicopter is en route.
It is unknown what the boy was doing when he fell.