(Jan 10): The prime ministers of Canada and the UK said that a Ukrainian jet that crashed Wednesday near Tehran was probably brought down by an Iranian missile and called for an international probe of the disaster.

“We have intelligence from multiple sources, including our allies and our own intelligence. The evidence indicates that the plane was shot down by an Iranian surface-to-air missile,” Canadian Prime Minister Justin Trudeau told reporters in Ottawa. “This may well have been unintentional.”

More than a third of the 176 people aboard Ukraine International Airlines Flight 752, which plunged from the sky about two minutes after a pre-dawn takeoff, were from Canada. The Boeing 737-800 was on fire, according to witnesses on the ground and in other aircraft who were cited in a preliminary Iranian report on the crash.

UK Prime Minister Boris Johnson issued a statement later Thursday saying there is evidence Flight 752 was shot down by an Iranian surface-to-air missile.

“We are working closely with Canada and our international partners and there now needs to be a full, transparent investigation,” Johnson said.

Whether accidental or intentional, a shoot-down would echo two other instances of surface-to-air missiles striking civilian jets. In 2014, pro-Russian rebels in Ukraine fired on and destroyed a Malaysian Air jetliner. In 1988, an Iranian airliner was felled by a US cruiser after being mistaken for a hostile aircraft following a skirmish with Iranian boats.

Exclusive: Video verified by The New York Times shows a Ukrainian airliner being hit over Tehran on Wednesday https://t.co/brU9ZRmRX9

— The New York Times (@nytimes) January 9, 2020

President Donald Trump, speaking to reporters in Washington on Thursday, said, “I have my suspicions” about why the plane went down but said he didn’t say what those suspicions are.

“It was flying in a pretty rough neighbourhood,” Trump said. “Somebody could have made a mistake.”

Two surface-to-air missile launches were detected by a US spy satellite from an Iranian battery near the airport minutes after the jet took off, followed by an explosion near the plane, said a person familiar with the investigation who spoke on the condition of anonymity.

The Russian-made SA-15 missile, also known as a Gauntlet or a Tor, are suspected of being involved. They are short-range weapons designed to attack planes, helicopters and other airborne targets.

The New York Times reported that it had obtained a video that appears to show an Iranian missile hitting a plane near the Tehran airport. The video shows a small explosion occurring when a missile struck the jet, which didn’t explode, according to the Times.

State-run IRNA denied that a missile hit the plane, citing a statement from Iranian government spokesman Ali Rabiei.

“News of two missiles hitting the Ukrainian plane has circulated in media with much fanfare, in a calculated and well-known manner and as part of a psychological warfare,” the report said. “Future will show that these claims are empty of truth and no one will bear responsibility for this big lie.”

Ali Abedzadeh, head of Iran’s Civil Aviation Organization, said “it’s not possible” for an Iranian rocket to have hit the plane.

“There’s a very defined relationship in Iran between military and civilian structures and it’s based on the regulations of the international civil aviation authority to which we comply, like all other countries,” he said in an interview on Iranian TV.

Canadians Killed in Iran Plane Crash Part of Large Diaspora

Boeing rose as much as 3.1% and was up 1.5% to US$336.34 at the close of trading in New York. If the plane was brought down by a missile strike, it could rule out a mechanical failure that would affect other Boeing aircraft.

“Our country is interested to find out the truth,” the Ukrainian president’s office said in a statement. “So we address all Ukraine’s international partners: if you have evidences that can help the investigation, please provide them.”

It said 45 Ukraine experts were working in Iran on the investigation and there are “several versions” for the cause under consideration.

Iranian President Hassan Rouhani and his Ukrainian counterpart, Volodymyr Zelenskiy, spoke by phone Thursday and agreed to form a task force involving their transport officials and foreign ministries, the semi-official Fars news agency reported, citing Rouhani’s deputy head of communications.

The US intelligence assessment is consistent with what some aviation accident experts have said. The apparent rapid spread of the fire combined with the sudden halt of radio transmissions from the plane after a normal climb aren’t consistent with previous crashes, said Jeffrey Guzzetti, the former head of accident investigations at the Federal Aviation Administration.

While Iranian officials initially said they suspected a problem with one of the plane’s engines, they retracted that in a preliminary report issued Thursday. The government also took the unusual step of setting up an investigative group to examine whether “any unlawful actions” initiated the fire on the plane, the preliminary report said.

Iran notified the International Civil Aviation Organization, an arm of the United Nations, about the crash, which should trigger involvement of other nations in the investigation, including the US, the agency said in a press release Thursday.

Under rules known as Annex 13, the nation in which a crash occurs usually is in charge of an investigation. Other nations are permitted to take part, such as the country in which the plane was made. Since Boeing manufactured the Ukrainian jet, the US National Transportation Safety Board would have a right to participate.

“Ukraine, as the operator country of the plane, is obliged to cooperate with us and share the plane’s necessary data for investigation,” Abedzadeh, the Iranian aviation official, said in a TV interview Thursday. “Others can also join in investigations.”

He said France, where portions of the engines were made, the US and Canada, because of the loss of so many of its citizens in the crash, had all been notified and can take part.

“France, Canada and the NTSB of the United States have expressed their readiness and introduced their representatives for cooperation,” he said.

NTSB spokesman Chris O’Neil declined to comment about whether Iran has reached out to the agency. The NTSB in a statement on Wednesday said it was monitoring the situation and consulting with other agencies about whether it could participate.

US restrictions on dealings with Iran prevent it from taking part. The US Treasury has granted waivers for US investigators to work in Iran in the past, but it has been a cumbersome process. Also, the NTSB has at times declined to send investigators to countries it deems unsafe.