The Syrian Democratic Forces, before the final confrontation, confirmed that those who defend the last territory they control in Syria "will be killed in battle" if they do not surrender.
The Kurdish Arab Alliance said they were trying to evacuate the besieged civilians in the last half of a square kilometer of the area controlled by the preacher before storming the stronghold of extremists, AFP reported.
"We are working to isolate and evacuate civilians before we attack them," spokesman Mustafa Bali said, declining to give further details on the operation.
"They have only two options, either to surrender or to kill them in battle," he said.
Meanwhile, an informed source told Agence France-Presse that Da'ash fighters were searching for a safe passage to the city of Idlib in northwestern Syria.
"They want to take civilians to stay with them as human shields, but the Syrian Democratic forces do not want to discuss this," the source, who asked not to be named, told AFP.
For its part, the Syrian Observatory for Human Rights said the Syrian Democratic Forces rejected the request.
The AFP was unable to confirm this with an official of the Syrian Democratic Forces, but a commander with the alliance said a supporter had no leverage to negotiate.
"They are trapped in a very narrow area and have no choice but to surrender," the commander said.
A small part of the buildings in the village of El-Beghawaz are all that remains of what was considered the state declared by the organization when it was at its height covering the size of the United Kingdom.
On Tuesday, the United Nations expressed concern that "some 200 families, including many women and children who were reportedly trapped," had been placed in a Dahesh camp.
"Many of them appear to be denied leave by a preacher," the United Nations said in a statement. Finished