Moscow and Ankara traded blame over the strike in northwest Syria, the deadliest attack suffered by the Turkish army in nearly 30 years. Turkish financial markets plunged over the prospect of the country being pulled far more deeply into a new escalation of the nine-year-old war across the border in Syria.
"We have decided, effectively immediately, not to stop Syrian refugees from reaching Europe by land or sea," a senior Turkish official told Reuters on condition of anonymity.
"All refugees, including Syrians, are now welcome to cross into the European Union," the official said, adding that police and border guards had been stood down.