OTTAWA, Jan 10 — A Ukrainian airliner that crashed in Iran, killing all 176 people aboard, was likely brought down by an Iranian missile, Canada's prime minister, Justin Trudeau, said yesterday, citing intelligence from Canadian and other sources.

The destruction of the airliner, which carried 63 Canadians, “may well have been unintentional,” Trudeau told a news conference in Ottawa.

“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,” he said.

The Ukraine International Airlines flight to Kiev from Tehran crashed on Wednesday hours after Iran fired ballistic missiles at two US military bases in Iraq, and Iranians were on high alert for a US military response.

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Trudeau said his government would not rest until it had obtained closure, transparency, accountability and justice.

Earlier yesterday, a US official, citing an extensive review of satellite data, said Washington had concluded with a high degree of certainty that anti-aircraft missiles brought down the plane. The official said the Boeing 737-800 had been tracked by Iranian radar.

The US government believes Iran shot down the plane by mistake, three US officials told Reuters.

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The data showed the plane was airborne for two minutes after departing Tehran when the heat signatures of two surface-to-air missiles were detected, one of the officials said.

That was quickly followed by an explosion in the vicinity of the plane, this official said. Heat signature data then showed it on fire as it went down. Heat signatures are infrared emissions detected by US military satellites.

Iran denied that the airliner had been hit by a missile, government spokesman Ali Rabiei said in a statement.

“All these reports are a psychological warfare against Iran ... all those countries whose citizens were aboard the plane can send representatives and we urge Boeing to send its representative to join the process of investigating the black box,” he said.

An initial report issued by Iran's civil aviation organisation yesterday said the three-year-old airliner, which had its last scheduled maintenance on Monday, encountered a technical problem shortly after take-off and started to head toward a nearby airport before it crashed.

Speaking to reporters at the White House, US President Donald Trump said he did not believe the crash of the airliner was due to a mechanical issue.

“It's a tragic thing. But somebody could have made a mistake — on the other side,” Trump said.

Tensions between Washington and Tehran have risen since Trump ordered the US drone killing of a top Iranian general on Friday. Trump has refrained from ordering more military action and Iran's foreign minister said the strikes on Iraqi bases that house US forces had “concluded” Tehran's response.

Technical problem

Investigations into airliner crashes require regulators, experts and companies across several international jurisdictions to work together. It can take months to fully determine the cause and issuing an initial report within 24 hours is rare.

The Ukrainian airliner took off at 6.12am local time and was given permission to climb to 26,000 feet, Iran's report said. It crashed six minutes later near the town of Sabashahr.

There was no radio communication from the pilot and the aircraft disappeared from radar at 8,000 feet (2,440 m), the report said.

Bodies and body parts recovered from the site of the crash were taken to the coroner's office for identification, it said.

Smouldering debris, including shoes and clothes, was strewn across a field where the plane crashed. Rescue workers in face masks laid out scores of body bags.

Ukraine had outlined four potential scenarios to explain the crash, including a missile strike and terrorism. Kiev said its investigators wanted to search the crash site for possible debris of a Russian-made missile used by Iran's military.

Boeing and US Federal Aviation Administration declined to comment yesterday, as did the Pentagon. Spokeswomen for Ukraine's president and prime minister did not immediately respond to a request for comment.

Boeing is still reeling from two deadly crashes of 737 MAX planes in five months that led to the plane's grounding in March 2019. The 737-800 that crashed was built in 2016 and is the prior generation of the 737 before the MAX. Boeing has built about 5,000 of those planes, which have a good safety record.

Boeing shares rose yesterday.

The FAA had banned US carriers from operating in the airspace over Iraq, Iran, the Gulf of Oman and the waters between Iran and Saudi Arabia in the hours after Iran's attack on US-led forces in Iraq. Several other airlines also diverted flights.

Riki Ellison, a defence expert and founder of the Missile Defence Advocacy Alliance, said the radar signature of a Boeing airliner would have been quite similar to a large US military transport plane.

“They (the Iranians) were on full alert to shoot down anything that resembled a US aircraft. Somebody made a mistake by identifying it as a warplane,” Ellison said.

Once the missiles were fired, it would have been impossible to divert them, even if the ground operators realised their error, he said. “Once you shoot those things, it’s over.” — Reuters