Former Australian prime minister Tony Abbott has claimed “very top” level Malaysian officials believed vanished Flight MH370 was deliberately downed by the captain in a mass murder-suicide.

The Malaysia Airlines jet vanished on March 8, 2014 carrying 239 people — mostly from China — en route from Kuala Lumpur to Beijing.

No sign of the plane was found in a 120,000-square kilometer (46,000-square mile) Indian Ocean search zone and the Australian-led search, the largest in aviation history, was suspended in January 2017.

A US exploration firm launched a private hunt in 2018 but it ended after several months of scouring the seabed without success.

The disappearance of the plane has long been the subject of a host of theories — ranging from the credible to outlandish — including that veteran pilot Zaharie Ahmad Shah had gone rogue.

In an excerpt from a Sky News documentary airing Wednesday, Abbott claims he was told within a week of it vanishing that Malaysia believed the captain had intentionally downed the jet.

“My very clear understanding from the very top levels of the Malaysian government is that from very, very early on here, they thought it was murder-suicide by the pilot,” he said.

“I’m not going to say who said what to whom but let me reiterate, I want to be absolutely crystal clear, it was understood at the highest levels that this was almost certainly murder-suicide by the pilot — mass murder-suicide by the pilot.”