It is “almost inconceivable” that missing Malaysia Airlines flight 370 has not been found, according to the final report into the missing aircraft.
The Boeing 777 disappeared in 2014 while flying to Beijing from Kuala Lumpur with 239 people on board.
The search for the aircraft, also involving Malaysia and China, was called off in January after 1,046 days.
Australian investigators said they “deeply regretted” it had not been found, the BBC reported.
The Australian Transport Safety Bureau said: “It is almost inconceivable and certainly societally unacceptable in the modern aviation era with 10 million passengers boarding commercial aircraft every day, for a large commercial aircraft to be missing and for the world not to know with certainty what became of the aircraft and those on board.
“Despite the extraordinary efforts of hundreds of people involved in the search from around the world, the aircraft has not been located.”
The final report reiterated estimates from December and April that the Boeing 777 was most likely located 9,700 square miles to the north of the earlier search zone in the southern Indian Ocean.
The Australian government has said only “credible” new evidence will prompt it to resume the search.
The Malaysian government is continuing to investigate the circumstances surrounding the disappearance.