British security officials continue to attempt to trace three UK sisters feared to have crossed into Syria with their nine children.
Their husbands have made tearful appeals for them to return home to Bradford in West Yorkshire.
They haven't made contact since last week, en route home from pilgrimage in Saudi Arabia with their children aged 3 to 15.
Their brother is thought to have been fighting in the region with the Islamic State.
Dr David Lowe, former counter-terror police officer says if they are in Syria it's not necessarily the case they'll want to stay there.
IN: "Once they've...
OUT: ...live there."
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