There were five people onboard when it crashed, including two Australians, two Indonesian locals and the pilot. The helicopter fell into a mixed-residential area near the ocean, with images showing the aircraft upside down between a rock face and a villa.Emergency responders rushed to the scene, where all five people on board were treated and three were taken to Siloam Hospital with serious injuries. The Indonesian search and rescue agency, Basarnas, reported the helicopter took off from Garuda Wisnu Kencana (GWK) for a tour of the island from 2.33pm local time.