A powerful Ukrainian rebel leader has confirmed that pro-Russian separatists had an anti-aircraft missile of the type Washington says was used to shoot down Malaysia Airlines flight MH17 and it could have originated in Russia.

Alexander Khodakovsky, commander of the Vostok Battalion, acknowledged for the first time since the airliner was brought down in eastern Ukraine on Thursday that the rebels did possess the BUK missile system and said it could have been sent back subsequently to remove proof of its presence.

Before the Malaysian plane was shot down, rebels had boasted of obtaining the BUK missiles, which can shoot down airliners at cruising height. But since the disaster the separatists’ main group, the self-proclaimed People’s Republic of Donetsk, has repeatedly denied ever having possessed such weapons.

Since the airliner crashed with the loss of all 298 on board, the most contentious issue has been who fired the missile that brought the jet down in an area where government forces are fighting pro-Russian rebels.

In an interview with Reuters, Mr Khodakovsky blamed the Kiev authorities for provoking what may have been the missile strike that destroyed the doomed airliner, saying Kiev had deliberately launched air strikes in the area, knowing the missiles were in place.

“I knew that a BUK came from Luhansk. At the time I was told that a BUK from Luhansk was coming under the flag of the LNR,” he said, referring to the Luhansk People’s Republic, the main rebel group operating in Luhansk, one of two rebel provinces along with Donetsk, the province where the crash took place.

“That BUK I know about. I heard about it. I think they sent it back. Because I found out about it at exactly the moment that I found out that this tragedy had taken place. They probably sent it back in order to remove proof of its presence,” Mr Khodakovsky said.

“The question is this: Ukraine received timely evidence that the volunteers have this technology, through the fault of Russia. It not only did nothing to protect security, but provoked the use of this type of weapon against a plane that was flying with peaceful civilians,” he said.

“They knew that this BUK existed; that the BUK was heading for Snezhnoye,” he said, referring to a village 10km west of the crash site. “They knew that it would be deployed there, and provoked the use of this BUK by starting an air strike on a target they didn’t need, that their planes hadn’t touched for a week.”

“And that day, they were intensively flying, and exactly at the moment of the shooting, at the moment the civilian plane flew overhead, they launched air strikes. Even if there was a BUK, and even if the BUK was used, Ukraine did everything to ensure that a civilian aircraft was shot down.”

Washington believes that pro-Russian separatists most likely shot down the airliner “by mistake,” not realising it was a civilian passenger flight, US intelligence officials said.

The officials said the “most plausible explanation” for the destruction of the plane was that the separatists fired a Russian-made SA-11 – also known as a BUK – missile at it after mistaking it for another kind of aircraft.

Mr Khodakovsky is a former head of the “Alpha” anti-terrorism unit of the security service in Donetsk, and one of the few major rebel commanders in Donetsk who actually hails from Ukraine rather than Russia.

Reuters