Ukraine and Canada are demanding accountability for Iran after it admitted to shooting down a Ukrainian jet shortly after it took off from Tehran this week, killing all 176 people on board.

After first blaming the crash on technical issues, Iran said early Saturday that it shot down the plane headed for Kyiv because of a "human error." Among the victims of the crash were 11 Ukrainians and 57 Canadians.

“Ukraine insists on a full admission of guilt,” Ukrainian President Volodymyr Zelensky tweeted Saturday. “We expect Iran to bring those responsible to justice, return the bodies, pay compensation and issue an official apology. The investigation must be full, open & continue without delays or obstacles.”

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This morning brings the truth.

Ukraine insists on a full admission of guilt. We expect Iran to bring those responsible to justice, return the bodies, pay compensation and issue an official apology. The investigation must be full, open & continue without delays or obstacles. — Володимир Зеленський (@ZelenskyyUa) January 11, 2020

“The Prime Minister and the President agreed on the need for a full, credible, and complete investigation of the crash and discussed Canada’s continued support for the investigation. Both leaders highlighted the need for cooperation to build a complete picture of the event, so that all those who suffered losses can get the answers they deserve,” Canadian Prime Minister Justin Trudeau Justin Pierre James TrudeauCanada says former ambassador to US violated conflict-of-interest law No new Canadian COVID-19 deaths reported for first time since mid-March Trudeau announces millions for first 'Black Entrepreneurship Program' MORE’s office said in a readout of a call with Zelensky.

Reports first emerged Thursday that officials believed the Boeing 737-800, which belonged to Ukraine International Airlines, "was shot down by an Iranian surface to air missile" early Wednesday morning, though for days Tehran denied any role before changing its story.

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“Preliminary conclusions of internal investigation by Armed Forces: Human error at time of crisis caused by US adventurism led to disaster,” Iranian Foreign Minister Mohammad Javad Zarif tweeted. “Our profound regrets, apologies and condolences to our people, to the families of all victims, and to other affected nations.”

A sad day. Preliminary conclusions of internal investigation by Armed Forces:



Human error at time of crisis caused by US adventurism led to disaster



Our profound regrets, apologies and condolences to our people, to the families of all victims, and to other affected nations. — Javad Zarif (@JZarif) January 11, 2020

Shortly before the crash, Iran had launched ballistic missiles at two Iraqi military bases housing U.S. troops in response to last week’s killing of Iranian Gen. Qassem Soleimani in an American drone strike in Baghdad.

Tensions between the two sides had reached a boiling point in recent weeks, but President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE on Wednesday appeared to signal that there would be no immediate further military action after the Iranian attacks on Iraqi bases saw no casualties.