epa04413302 Syrian refugees cross the Syrian-Turkish border near Sanliurfa, Turkey, 23 September 2014. The Islamic State assault against dozens of Kurdish villages in northern Syria could create a mass exodus, with up to 400,000 seeking refuge in neighbouring Turkey, a United Nations official warned. According to Turkish authorities, 138,000 Kurdish Syrians have poured into the country since late last week. It is unclear if the entire population of the region will ultimately end up fleeing. EPA/ULAS YUNUS TOSUN

