Meanwhile, the United States has never provided the Kurdish People's Protection Units (YPG) with weapons, US Secretary of State Rex Tillerson said during a joint press conference with Lebanon’s Prime Minister Saad Hariri on Thursday.
"We have never given heavy arms to the YPG, so there’s none to take back," Tillerson said.
Washington explains its backing of the Kurds by the need to fight against the Daesh terrorist group, outlawed in the United States and Russia among other states.
Ankara considers the YPG to be affiliated with the Kurdistan Workers' Party (PKK). Tensions between Ankara and the PKK escalated in July 2015 when the ceasefire collapsed because of a series of terror attacks allegedly committed by the militants.