Prime Minister Trudeau is among those confirming that all evidence suggests the Ukranian plane that crashed yesterday morning in Iran, killing all on board — many of them Canadians — was, in fact, shot down.

Trudeau says intelligence indicates Flight 752 was shot down by an Iranian surface-to-air missile. https://t.co/7P4koh9sD9 pic.twitter.com/6UdgHnGWax

— CBC News: The National (@CBCTheNational) January 9, 2020

Iranian authorities initially claimed that the accident had most likely been caused by technical or mechanical difficulties, though they refused to grant the aircraft's manufacturer access to the black box holding crucial data about what happened with the flight.

Iran accidentally downed Ukraine airliner with a surface-to-air missile, says U.S., Canada https://t.co/Jc2WtfcfLt pic.twitter.com/jCU9zsrNcL

— Reuters (@Reuters) January 9, 2020

U.S. and other intelligence is now saying that the plane was hit with surface-to-air missile fire, whether intentionally or accidentally.

#BREAKING: New York Times confirms video to show Ukrainian flight #PS752 and the moment a missile strikespic.twitter.com/nDiZckxyVD

— Amichai Stein (@AmichaiStein1) January 9, 2020

Many Canadians are shocked about this revelation and its political implications, taking to social media to demand that Trudeau take a firm stand against Iran given the 63 Canadian lives lost.

The shocking news that Flight 752 may have been shot down makes the situation in the region even more volatile.

I'm repeating our call for the gov't to call the House of Commons back.

Cdns deserve answers and to be heard before the gov't makes any decisions and things escalate.

— Jagmeet Singh (@theJagmeetSingh) January 9, 2020

Others are calling for continued attempts to de-escalate tensions with Iran to prevent a Third World War.

Trudeau is asked if the United States is to blame for the downed airliner by setting off a chain of events with the assisination of a senior Iranian general. Read more about this story here: https://t.co/Gd3yWnn9GC pic.twitter.com/YIXVvqWqnN

— CBC Politics (@CBCPolitics) January 9, 2020

A number of people are also blaming the tragedy, at least in part, on U.S. President Donald Trump's killing of top Iranian military leader Qassim Soleimani last week, which led to to advent of trending hashtags like #TrumpsWar and #wwIII on social media.

Call out Trump, big guy. If it weren't for him those people would be alive.

— Just call me Eva (@So_damntired) January 9, 2020

After news broke of the ill-fated Ukraine International Airlines flight PS752, there was mass speculation that the accident may have been related to the backlash that took place after Soleimani's death, which included Iranian attacks on two military bases housing U.S. troops in Iraq.

So, now at least Canada, UK and U.S. all believe that it was an #Iranian missile that downed the Ukrainian Jet. It is mind-boggling there are still people out there defending this Tehran regime!https://t.co/DNEb78psLq

— Arsen Ostrovsky (@Ostrov_A) January 9, 2020

Iran fired missiles at the bases just hours before PS752 crashed outside the capital city of Tehran on its way to Kiev, Ukraine, and video footage showed the aircraft engulfing into flames before falling from the sky — inconsistent with potential engine trouble.

The flight route was a popular one for travelers connecting to Toronto.

Among the 176 victims of the accident were also 82 Iranian, 11 Ukrainian, 10 Swedish, four Afghan, three German and three British nationals, making many wonder how Iran could have killed so many of its own people if the strike was in fact intentional.

Figured. A plane with engine failure does not just fall out of the sky like that. That horrible. How could Iran killed so many of their own :(

— Cher Wilson (@cherwils0n) January 9, 2020

Trudeau is among the sources suggesting the fire was likely misdirected and accidental, and is seeking the cooperation of Iran to further the investigation into what exactly happened.