(Reuters) - Ukraine and Canada have agreed to push for an objective investigation into the crash of a Ukrainian passenger plane in Iran, President Volodymyr Zelenskiy said on Friday after speaking with Prime Minister Justin Trudeau.

"There should not be speculation about the tragedy; Ukraine and Canada will use all possible means to advocate for an objective and comprehensive investigation," Zelenskiy wrote on Twitter.

Ukraine has previously said there were many versions of what could have caused the crash, which killed all 176 people on board on Wednesday.