All six people on board a single-engine sea plane that crashed into Cowan Creek at Jerusalem Bay in Sydney's north on Sunday afternoon have died, police have confirmed.
The Sydney Seaplanes aircraft, carrying a pilot and five passengers, crashed about 3.15pm and a search and rescue operation was attempting to locate the aircraft which is believed to be submerged.
NSW Police confirmed three bodies had been recovered, and an operation was under way to recover the remaining three bodies. There was no further information on the identities of those on board.
There are unconfirmed reports that those on board were four British Nationals, an 11-year-old boy and the pilot.
The aircraft has not yet been recovered, and police said they were unsure whether it would be able to be recovered on Sunday evening.
The Australian Transport Safety Bureau identified the aircraft as a DHC-2 Beaver Seaplane which was "on a return flight to Rose Bay, Sydney Harbour".
"The sequence of events leading up to the accident are not yet understood, however following the impact with the water, the aircraft is reported to have sunk rapidly."
A spokesman for Sydney Seaplanes confirmed that an incident had occurred with a plane believed to belong to the company.
"We're just working with police to make sure that all assistance can be rendered," the spokesman said.
Seven News reported that phone footage taken by a group of men on a jet ski showed a Sydney Seaplane overhead, believed to have been captured "just moments before it is submerged".
The Australian Transport Safety Bureau will investigate the incident and release a preliminary report in approximately 30 days, with a final report expected to take up to 12 months.
The Westpac Life Saver Rescue Helicopter found an oil slick and several items of debris on the surface of Cowan Creek, spokesman Stephen Leahy said.
"There appeared to be a silhouette or outline of a small aircraft but it appeared to be submerged in deep water," he said.
"It was certainly too deep for us to access it and that's why the police divers have been called in."