US forces withdrew from a key base in northern
Syria Sunday, a monitor said, two days before the end of a US-brokered truce to stem a
Turkish attack on Kurdish forces in the region.
An AFP correspondent saw more than 70 US armoured vehicles escorted by helicopters drive past the town of Tal Tamr carrying military equipment.
The Syrian Observatory for the
Human Rights said the convoy was evacuating the military base of Sarrin.