“The U.S. makes its determinations. We attempt to work as an international community on big issues. But sometimes countries take actions without informing their allies,” he said.

Trudeau said that while the government was working as quickly as possible to bring the bodies home for burial, it was likely to take weeks or “perhaps even months.”

Canada said on Monday that Iran had signaled that Canadian investigators would take an active role in the probe of the crash, which Iran said at the weekend had been caused by a missile it fired in a “disastrous mistake.”