Up to 70,000 Syrians are heading for Turkey, threatening to send a new wave of refugees into Europe as Syria's civil war intensifies.
The latest exodus came as Syrian regime forces advanced on the strategically vital opposition stronghold of Aleppo, closing in on a major victory with the help of sustained Russian air strikes on rebel positions.
With about 35,000 new refugees already gathering at Syria's Bab al-Salam crossing with Turkey, European foreign ministers and officials held emergency talks in Amsterdam with their Turkish counterparts to draw up a plan to deal with the crisis.
Jean Asselborn, Luxembourg's Foreign Minister, warned of the "very real prospect that there will be another huge influx of refugees", precipitated by what he called "indiscriminate" Russian bombing around Aleppo.
However, Turkey has resisted EU pressure to open the border-crossing for the refugees. The Bab al-Salam crossing has remained open until now and has been a key entry point for foreign fighters flocking to join the war.
Suleyman Tapsiz, the Governor of the Kilis border province, said a wave of at least 70,000 refugees was "a possibility" as the noose tightened around Aleppo, where around 350,000 rebels and civilians are trapped.
New arrivals are being accommodated "in eight camps on the Syrian side of the border," Tapsiz said, adding that in Turkey's view there was "no need for now" to transfer them to Turkey which has already absorbed more than two million refugees.
Johannes Hahn, a European commissioner, warned Turkey that it needed to cut dramatically the number of refugees reaching Greece within weeks or the pressure for more border closures and fences will grow.
Frustrated that refugees continue to stream into Greece despite a $5 billion deal between Ankara and Brussels to slow the flows, Hahn said Turkey must show results by the time EU leaders meet this month.
At the border, standing in the pouring rain, 29-year-old Ali begged guards to allow his disabled mother to cross to safety. He said he had lost a seventh member of his family to the bitter war that morning.
Mahmoud, his cousin, died after picking up what he thought was a toy. It was cluster bomb.