Thousands of Syrian refugees poured into northern Iraq "in a sudden, massive movement", the United Nations said.
On Friday, a spokesman for the UN High Commissioner for Refugees said:
Kurdistan remains relatively safe and stable, however tensions are increasing in view of the forthcoming elections and also to do with other domestic factors there. This does have impact on our (aid) delivery programme in Iraq, but nonetheless it is the region where most refugees have come into.
– Adrian Edwards, spokesman of the UN High Commissioner for Refugees
Overall the flow of Syrian refugees has dropped sharply since a peak earlier this year when 5,000 to 8,000 crossed every day into neighbouring countries, according to the UN.
Nearly two million people have fled Syria since the fighting started in the war-torn country and there are more than 150,000 Syrian refugees registered in Iraq, according to the United Nations.
Thousands of Syrian refugees poured into northern Iraq, taking advantage of a new bridge along the largely closed border, with most being women, children and elderly people from areas of heavy fighting, including Aleppo and Hassakeh.
The border between Syria and Iraq has been largely closed since authorities of the Kurdish regional government shut the crossing on May 19 - apart from a single formal crossing point.
Some Syrian refugees had been allowed in since mid-July for reasons of family reunification or dire humanitarian need, the UN added.
Thousands of Syrian refugees have poured into the Kurdistan region of northern Iraq taking advantage of a new bridge along the largely closed border.
Between 5,000 and 7,000 refugees followed a first group of some 750 people who crossed the pontoon bridge at Peshkhabour over the Tigris River, and more buses were seen dropping off families on the Syrian side.