Canadian and British officials said they are monitoring the situation for troops on the ground in Iraq.

On Twitter, General Jonathan Vance, the chief of the defense staff of the Canadian Armed Forces, said that all his country's personnel are safe following the missile attacks in Iraq.

"CAF families: I can assure you that all deployed CAF personnel are safe (and) accounted for," he said. "We remain vigilant."

Separately, the UK said it was "urgently working to establish the facts on the ground" in Iraq, a spokeswoman for the Foreign and Commonwealth Office told CNN in the early hours of Wednesday morning in London.

"Our first priority is the security of British Personnel," the spokeswoman said.