叙利亚难民滞留土叙边境

While Turkey says it has reached its "capacity to absorb" refugees, Turkish aid workers are providing tents and supplies for Syrian refugees who have gathered at the border between the two countries.

Deputy Prime Minister Numan Kurtulmus told cnn-Turk television Sunday Turkey has already taken in 3 million refugees, the vast majority of them Syrians.

Turkey has closed its Oncupinar border opposite Syria's Bab al-Samam frontier where thousands of Syrians massed Sunday for a third day waiting for the border to open. Turkish officials say up to 35,000 Syrians are waiting at the border. The Syrians are escaping a Russia-backed government offensive in the Syrian city of Aleppo.

It was not immediately clear, however, what has to happen before the crossing is opened.