Erdogan is expected to sit down with Emmanuel Macron, Angela Merkel and Boris Johnson at a time of high tensions in the North Atlantic Treaty Organisation alliance over Turkey's offensive last month against Kurdish militants, who had been a key ally for the West against the Islamic State group.
Roebuck, a longtime USA diplomat in the Arab world who served as ambassador to Bahrain, has been in charge of on-the-ground coordination with Kurdish fighters in Syria, who bore the brunt of the US-backed campaign that crushed the Islamic State group. Syrian government forces have since clashed with Turkish troops and Turkey-backed opposition fighters, despite a shaky truce brokered by Russian Federation.
SANA said Saturday's clashes included heavy machine gun fire and occurred in the village of Um Shaifa near the town of Ras al-Ayn.
Interior Minister Suleyman Soylu made the comments on Friday, days after Ankara insisted that suspected members of the extremist group held by Turkey would be returned regardless of home countries revoking their citizenship.
The Free Burma Rangers, a humanitarian group active in northeast Syria, said four Syrian army soldiers were killed and seven were wounded, including a general.
Erdogan had referred the decided deadline in his agreement before his visit to Hungary and had said that when we negotiated, they have promised that Kurdish YPG will leave in 120 hours.
"Those concerns remain and we have raised this with the highest level of the Turkish government", she said.
The Observatory said government forces withdrew from several areas, including Um Shaifa, leaving Kurdish fighters alone to face the attacks, which also involved Turkish drones.
The PKK/YPG terrorist group continued to violate the safe zone deals that Turkey hammered with the USA and Russian Federation, the Turkish Defense Ministry said on November 9.
The U.S. has said the move is aimed at preventing the oil fields from falling into the hands of Islamic State militants.