UN warns of 'disaster' once Iraqi troops take on IS in Mosul

A looming Iraqi military operation against the Islamic State group in Mosul could spark "one of the largest man-made disasters" in years, the U.N. refugee agency's top official in Iraq warned Thursday, urging the international community to keep up support for displaced Iraqis before a battle that could mark a turning point for the war-ravaged country.

Bruno Geddo of UNHCR says more than 1 million people could be displaced by the campaign to retake the largest IS-held city, which has an estimated population of 1.2 to 1.5 million. The Iraqi government has pledged to retake Mosul this year, but has not announced a date for the operation — and has been gearing up with...