Workers at a Panorama House, Bulli Tops battled unsuccessfully to rescue survivors and put out the flames after a helicopter crashed in their grounds on Thursday afternoon.
Four people are believed to have been killed when the Robinson R44 helicopter apparently hit a gum tree coming in to land at the cliff-top site.
The helicopter crashed about 50 metres from the centre in a clearing used for landing and take-off by sightseeing helicopters.
There have been a number of reports that a child was among those on board, although this has not been confirmed by NSW Police.
Superintendent Steven Baker, from Fire and Rescue NSW, said venue staff had used fire extinguishers to attempt to tackle the blazing wreckage before emergency services arrived.
[source_author]The Daily Telegraph[/source_author]