“Our revolutionary ideology does not allow us to sell the blood of the holy warriors who liberated Ghouta,” Hamza Bayraqdar, the Army of Islam’s chief military spokesperson, said in a video posted online on Tuesday.
“We will stay in Ghouta and defend it.”
The announcement comes as Syrian President Bashar al Assad’s forces advanced into the rebel district, capturing more than half of the territory of farms and towns that the opposition has held since 2012. Rebels have repeatedly denied they have been in talks which could see fighters and their families bussed to opposition-held Idlib province in the north-west as part of an amnesty deal similar to Aleppo and Daraya.
A Russian-backed Syrian government assault on Ghouta launched last month has caused more than 1,000 deaths and injured more than 6,000 people, according to monitors and medical charities. The violence is some of the worst of Syria’s seven-year-old conflict to date.
Eastern Ghouta bombings: Syrian war in pictures
The UN says up to 400,000 people remain in the besieged areas, including the town of Douma.
While appeals for all parties to adhere to a UN resolution demanding a ceasefire have fallen on deaf ears, for the first time on Tuesday a total of 35 people in need of urgent medical treatment and their chaperones were escorted out of the area safely.
Deana Lynn, an American woman living in Douma with her husband and children, told The Independent that her family and many others have been using basements to hide from shelling and bombing over the last few weeks.
There were fewer fighter planes and strikes on the town on Tuesday, she said, probably as a result of the evacuations – but like many in the area she didn’t know how long the arrangement would last.
Even as she spoke the thud of an air strike she said was from a Russian plane could be heard in the background, ending the brief respite. A baby began to cry.
Elsewhere in the Syrian capital, the military said it had seized a southern suburb after an evacuation deal which saw 1,000 people bussed to Idlib, the last major rebel stronghold, in the country’s north-east.
The evacuees included some 300 militants from the extremist Ajnad al-Sham faction and their families.
Ms Lynn says she hopes the US and international community can exert pressure on Moscow and Damascus so that her family could avoid a similar fate.
Syrians make fuel from plastic waste
Regardless, everyone in her family has a small bag ready in case they have to flee at short notice.
“I don’t want to leave eastern Ghouta. My children grew up here, it’s my home, this is the place they know.
“I think people in general they don’t want to leave or become displaced. What would they do in Idlib? They would have to look for a home or they’d have to leave for Turkey or Europe.
“We hope it won’t happen to us… I just hope we’ll be safe.”