More than 3,000 people are reported to have left the besieged city of Aleppo in the last 24 hours.

About 40% of the militant-held part of the city has been liberated, the Russian Center for Reconciliation said.

Amnesty International has called on government forces to allow thsoe fleeing to move freely, and ensure they are protected from revenge attacks.

"Syrian government forces have repeatedly launched unlawful attacks on Aleppo city displaying a callous disregard for the safety of civilians living in parts of the city controlled by armed opposition groups,” said Colm O’Gorman, Executive Director of Amnesty International Ireland.

"Given the Syrian government’s long and dark history of arbitrary detention and enforced disappearances on a mass scale it is even more crucial that civilians are protected in newly captured areas of Aleppo city."

The Syrian Army is continuing their large-scale offensive in eastern Aleppo, targeting Al-Nusra Front and other radical militants still controlling the area. The troops have already established control over important blocks and districts in the eastern part of the city.