The United Nations said on Thursday up to 200,000 more people might flee Mosul as Iraqi forces push into the last districts held by Islamic State militants.

Iraqi authorities and aid agencies are already struggling to cope with a surge in displacement since security forces opened a new front against the militants in Mosul earlier this month.

Backed by a U.S.-led coalition, Iraqi forces have dislodged Islamic State from all but about 12 sq. km (5 sq. miles) of the city and are seeking to claim victory before the holy month of Ramadan in less than two weeks.