The Syrian ambassador to the UN indicated that PYD-allied forces in the country have been supported not only by the US but also by Bashar al Assad's regime.
"These Syrian Kurds [PYD-allied groups] supported by the American administration are also supported by the Syrian government, just for your kind information", the ambassador Bashar Ja'afari told reporters on Tuesday following a closed-door UN Security Council meeting on Turkey's recent shelling of PYD targets in northern Syria.
The Security Council session, in which no decision of action was taken, was held at the request of permanent member Russia.
"The victory achieved in the northern part of Syria, both by the Syrian army and the Syrian Kurds, is a joint victory for all the Syrians. Everybody is benefiting from the Syrian army direct support," Ja'afari said.
A recent row between Turkey and the US -- longtime NATO allies -- focused on Washington’s objection to describing the PYD as a terrorist group.
Turkey considers the PYD as the Syrian extension of the PKK while the US considers it as an ally against DAESH.
Turkey has long been confronted with armed attacks in its southeastern and eastern regions by the PKK, which is recognised as a terrorist organisation by Turkey, the US, and the EU.
Ja'afari's statement marks one of Syrian regime's first direct acknowledgements of its cooperation with the PYD.
Turkish Armed Forces have kept shelling YPG targets in northern Syria for four straight days, after the group seized a strategically critical air base north of Aleppo, further complicating the conflict on NATO-member Turkey's southern border.
Prime Minister Ahmet Davutoglu said that the government previously warned YPG, which is the militant wing of the PYD, to withdraw from the areas it has recently captured from Syrian opposition forces.
However, the group failed to comply with the Turkish demands, leading to Turkish shelling of militant outposts near the Turkish border, Davutoglu recounted.