Canadian Prime Minister Justin Trudeau, responding to Iran's statement that a missile shot down a Ukrainian airliner this week, said on Saturday that his government sought a full investigation and full cooperation from the Iranian authorities.

Canada: PM Justin Trudeau wants 'full investigation' into plane crash

Canada on Friday lowered the number of its citizens killed in the crash of a jetliner in Iran from 63 to 57. "This is based on additional information we had about birth dates and comparing the travel documents that people were travelling on when they boarded the flight," Foreign Minister Francois-Philippe Champagne told a press conference.

Ottawa lowers Canadian death toll in Iran air crash to 57

Iran's civil aviation investigators said on Thursday that the Ukrainian Boeing 737 airliner which crashed in Tehran had "turned back" after it detected a problem.

Ukrainian Boeing 737 airliner turned, was headed to airport when it crashed: Iran civil aviation authority