Hundreds of rebels, their relatives and other civilians left a string of towns late yesterday after Faylaq al-Rahman, the rebel faction that controls the area around Arbin, agreed to a negotiated withdrawal.
Assad's forces controlled the entirety of the city of Harasta, which headed the departure negotiations, from which about 4 thousand civilians and fighters left in 85 buses, according to a census, which Enab Baladi managed to get from the city's "local council".
Syrian rebel fighters have evacuated one enclave in eastern Ghouta and reached a Russian-brokered deal to leave another, enabling Syrian government forces to regain control over most of the embattled Damascus suburb, war observers said.
Syria and its ally Russian Federation have threatened to resume bombing the final opposition holdout of Douma in Eastern Ghouta unless rebels there agree to evacuate, sources told AFP on Tuesday.
Regime forces have executed at least five farmers in Kafr Batna, which was controlled by the anti-regime Faylaq al-Rahman.
Almost 1,000 people - including rebels, their relatives and other civilians - were moved out on Saturday, followed by 5,435 people on Sunday.
President Bashar al-Assad has used such agreements to recover swathes of territory since the uprising against him began seven years ago this month.
He also stressed that Turkey's stance on the events would be significantly different "if Ankara did not show political will, failing to clinch agreements with Russian Federation and Iran and agreeing with the Syrian Army's operation in the area".
They have usually begun with the military encirclement of an area, followed by bombardment and a ground operation before a deal is reached.
"The Army of Islam has taken the decision to stay put, but there is hope they will change their mind", said a Douma-based opposition activist, who spoke on condition of anonymity for fear of reprisals.
Eastern Ghouta lies within mortar range of Damascus, and rebels had repeatedly used it as a launchpad for rocket attacks on the capital.
"Negotiations are ongoing, but they've been delayed by internal differences in the rebel group", Rami Abdel Rahman, head of the Syrian Observatory for Human Rights, told AFP.
The first round of negotiations between the Douma-based rebels and the Russians included talks on improving shelters for displaced civilians, the statement added.
The deal also demands the rebels to set free people they have previously kidnapped.
Only the town of Douma, the most populous part of eastern Ghouta, remains under rebel control.