Syria's regime drew closer to taking full control of Eastern Ghouta on Monday as state media reported that fighters began evacuating from the last rebel-held pocket of the former opposition stronghold near Damascus.
A Russian-brokered deal had been reported on Sunday for fighters with Jaish al-Islam, the largest rebel group still in Ghouta, to leave the enclave's main town of Douma.
But the rebels have not yet confirmed the agreement, amid reports of divisions in the group as hardline fighters refuse to abandon their posts.
Assad's forces have retaken 95 per cent of Eastern Ghouta since launching a blistering air and ground assault on the besieged enclave on February 18, killing 1,600 civilians and displacing tens of thousands more.
"A group of buses carrying a number of Jaish al-Islam terrorists and their families leave Douma in preparation of them being transported to Jarabulus," state news agency SANA said, using the government's term for all rebel fighters.
State television said six buses had left Douma, the only opposition holdout six weeks after the start of the offensive.
The rebels have been negotiating with Russia, a key ally of Assad, for days on an agreement to evacuate Douma.
"We will stay in this town and will not leave. Those who want to leave should leave," Essam al-Buidani says.
It was not immediately possible to verify when the video was filmed.
Backed by Russia, Assad's forces have scored a series of victories over rebel forces in recent years, often through campaigns of siege, aerial bombardment and ground offensives that have drawn widespread international condemnation.
After pounding it with air strikes, regime forces have taken back most of the enclave through a combination of ground assaults and Russia-brokered evacuation deals.