Iraq's government has reportedly sent Iran-backed Shia militias to attempt to recapture the city of Ramadi from the Islamic State.
Ramadi was seized by militants at the weekend after Iraqi forces fled their positions.
The city is the capital of Anbar province and only 110km west of Baghad.
US Secretary of State John Kerry says he is 'convinced' Ramadi will be recaptured.
But terrorism expert Natasha Underhill says it's an important moment in the struggle against IS.
IN: "Anything….
OUT: ...this point."
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