Prime Minister Scott Morrison says the downing of a Ukrainian plane over Iran was not an intentional act.

Canadian Prime Minister Justin Trudeau said he believed an Iranian missile brought the plane down, killing 176 people, including 63 Canadian citizens.

Mr Morrison said Australia had received similar intelligence to Canada and the United States about what happened to Ukraine International Airlines flight PS752.

"The intelligence that we have is similar to what our partners have, and that is there was nothing to suggest now at this point an intentional act," Mr Morrison told reporters in Canberra on Friday.