Some 180,000 have fled the Iraqi city of Hit ahead of Islamic State militants.
Iraqi officials are also confirming the Islamic State fighters overran one of their military bases near by.
The United Nations says this latest group of refugees - expected to head toward Ramadi, will need all the basics, food, water and medical help.
Yacoub El Hillo, the UN Humanitarian Coordinator in Syria, says the widening conflict is making it very hard to get help to anyone.
IN: "With the ...
OUT: ...credible way."
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