Turkish aid workers have been setting up tents and distributing supplies for thousands of new Syrian refugees kept from entering Turkey at the border.
Some 35,000 people fled a Syrian government offensive in the Aleppo area last week, trying to enter Turkey's Kilis border region.
But Turkey has so far closed the border to most of them despite appeals by EU leaders to let them cross.
The country already shelters more than 2.5 million refugees from Syria's war.