More than 235,000 people have fled from their homes in Syria’s rebel-held Idlib province, the UN says, as government forces step up their offensive on the area.
The exodus happened between 12 and 25 December as fighting intensified.
Idlib in north-western Syria is the last major region held by rebels opposed to President Bashar al-Assad.
The Russian-backed Syrian government has been bombarding Idlib since late November.
An increase in air strikes and ground fighting since mid-December has accelerated civilian displacement from the area, UN humanitarian agency Ocha said in a report.
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Tens of thousands of families – including some already displaced numerous times during the civil war – have been heading north in trucks and private cars.