The number of people fleeing their homes in Iraq nearly doubled almost overnight , U.N. says . Displaced within the city of Mosul itself : 25,000 . 500,000 people have been displaced from the northern city of Mosul . 500,000 have left their homes in Irbil province . The cities of Irbil and Mosul are hosting 500,000 internally displaced people .
The number of people fleeing their homes in Iraq nearly doubled almost overnight , U.N. says . 500,000 people have been displaced from the northern city of Mosul . 500,000 have left their homes in Irbil province . The cities of Irbil and Mosul are hosting 500,000 internally displaced people .