BY BBC,DEC 19,2016-Evacuations have resumed from east Aleppo, with buses and ambulances leaving rebel areas of the Syrian city.
At least 350 people reportedly left rebel enclaves late on Sunday, heading towards other rebel-held territory.
Earlier, buses sent to take people out of government-controlled areas, besieged by rebels, were set alight, halting the latest evacuation deal.
Among those to have left is seven-year-old Bana Alabed, who had tweeted about conditions in besieged areas of Aleppo.
Her departure was confirmed by the head of the Syrian-American Medical Society aid group.
Thousands more are waiting to leave east Aleppo, which is in dire conditions.
The UN Security Council is said to have agreed a compromise to allow UN monitoring of the operation. Russia earlier rejected a French-drafted plan to send UN officials to east Aleppo as “a disaster”.
“We expect to vote unanimously for this text,” said US Ambassador to the UN Samantha Power.
The Security Council meeting will start at 09:00 (14:00 GMT) in New York.
Despite further setbacks on Sunday, buses and ambulances began moving out of the area after nightfall.
“Evacuations are on,” the UN official said in an email message to Reuters news agency, adding that the first people left east Aleppo at around 23:00 local time (21:00 GMT).
Five buses carrying evacuees arrived in rebel-held Khan al-Assal, the AFP news agency said, quoting Ahmad al-Dbis, who heads a team of doctors coordinating evacuations to the town.
From Khan al-Assal, the evacuees are expected to travel to parts of Aleppo and Idlib provinces.
In order for the evacuation of east Aleppo to restart, pro-government forces have demanded that people must be allowed to leave the mainly Shia villages of Foah and Kefraya in Idlib province, besieged by rebels.
Some 1,200 people were due to be taken out of the former rebel enclave in return for a similar number moved out of the two government-held villages, Foah and Kefraya.
The Syrian Observatory for Human Rights, a UK-based monitoring group, said buses and ambulances entered the villages late on Sunday to prepare for evacuations.
Earlier on Sunday, armed men set fire to at least five buses that were about to transport the sick and injured from the villages.
Several reports said the Jabhat Fateh al-Sham group, linked to al-Qaeda, was responsible.
But Hezbollah, the Lebanese militant group fighting alongside Syria’s government, said the blaze started during fighting between the jihadists and another Islamist rebel group that supported the evacuations.
The jihadist groups have not commented on the attack.
However, the Free Syrian Army, a more moderate rebel faction, condemned it as a “reckless” act that had in turn endangered the lives of thousands of trapped people in eastern Aleppo.
Among the people waiting to leave eastern Aleppo are sick and wounded children, said the children’s charity Unicef.
Some young children have been forced to leave without their parents, the charity said, and hundreds of vulnerable children remain trapped.