Evacuations have resumed from east Aleppo, with buses and ambulances leaving rebel areas of the Syrian city.
At least 350 people have reportedly left rebel enclaves, heading towards other rebel-held territory.
Meanwhile, a separate evacuation of government-controlled parts of Idlib province, besieged by rebels, started early on Monday.
Thousands more are waiting to leave east Aleppo amid dire conditions.
The UN Security Council is said to have agreed to a compromise to allow UN monitoring of the operation.
The Syrian Observatory for Human Rights, a UK-based monitoring group, said early on Monday that 10 buses had now left the villages.
The Observatory said 500 of the 4,000 villagers had left.
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.
