"We have fully complied with the conditions of the ceasefire agreement," Redur Khalil told AFP just hours before a deadline.

"We have withdrawn all our military and security forces from the area of military operations from Ras al-Ain in the east to Tal Abyad in the west," he said.

Turkey and its Syrian proxies on October 9 launched a cross-border attack against Kurdish fighters in northeastern Syria after an announced US military pullout.

Turkey wants to set up a buffer zone on Syrian soil along the length of its southern frontier, to keep Kurdish forces it views as "terrorists" at bay.

A US-brokered truce agreement announced on Thursday requires Kurdish forces to withdraw from the area by late Tuesday.

"We have renewed the separation lines between us and the Turks east of Ras al-Ain on one side and west of Tal Abyad on the other," Khalil said.

Earlier, a US official said the head of the Kurdish-led Syrian Democratic Forces had also told Washington his forces had fully withdrawn.

The Turkish invasion was launched after the United States said they would pull out their troops from the north of the country, after years of relying on the Kurds to spearhead the fight in Syria against the Islamic State group.