Canada's Prime Minister Justin Trudeau has said that Ukraine should be allowed to strike deep inside Russia, despite Moscow threatening that this would draw Canada and its allies into direct war, The Canadian Press has reported.

"Canada fully supports Ukraine using long-range weaponry to prevent and interdict Russia's continued ability to degrade Ukrainian civilian infrastructure, and mostly to kill innocent civilians in their unjust war," Trudeau said.

Trudeau told reporters on Friday that Canada is "unequivocal" that Ukraine must win in fighting back against Russia's invasion, or it will encourage other large countries to try absorbing their neighbours.

He said Putin is trying to deeply destabilize the international rules-based order that protects us all.