"Now, when several districts where, according to our estimates, about 90,000 civilians live, have been freed from militants, the United Nations faces the moment of truth, we expect it to intensify efforts to assist them. These 90,000 Syrians have been liberated from the terrorists. They endured much suffering, they were used by the so-called moderate opposition very similar to Jabhat al-Nusra as 'human shields,' the United Nations must help them," the source said.
He added that Russian diplomats were maintaining constant contact with the United Nations seeking assistance for Syria's population.
"The UN representatives, working within the framework of the humanitarian task force, and media have repeatedly raised the issue of the so-called humanitarian catastrophe in the eastern Aleppo, which was controlled by the militants during many months. In particular, UN Special Envoy for Syria Staffan de Mistura and humanitarian adviser to UN special envoy for Syria Jan Egeland have made statements in this respect. Now, after the liberation of some parts of the eastern Aleppo, the United Nations should provide their residents with humanitarian assistance," the source said.
"The issue requires coordination with the Syrian government which is willing to cooperate with the United Nations," the source added.
Moreover, Russia ready to cooperate in the medical evacuation from the militants-held part of Syria's Aleppo.
"At the request of the UN, we are ready to assist in the medical evacuation from the part of Aleppo still controlled by the militants," the diplomatic source close to the ISSG's task forces in Geneva said.
"At the moment there is one corridor for militants and several corridors for civilians. These corridors can be used by the UN and for medical evacuation," the source said.
The situation in Aleppo has been seriously deteriorating over the recent months. Thousands of civilians are trapped in the terrorist-besieged eastern parts of Aleppo with no access to food or water. There have been several attempts to establish a ceasefire, however the bids have failed.
He added that Russian diplomats were maintaining constant contact with the United Nations seeking assistance for Syria's population.
"Several thousand people have fled southeastern Aleppo in the past 24 hours. They are being shot at by gunmen, but they are still fleeing. The firing should be stopped," the source said.
The Russian reconciliation center based in Syria estimates that more than 6,000 civilians, over half of them children, have escaped the terrorist-control areas of eastern Aleppo on Wednesday. On Tuesday, Russia’s Defense Ministry said Syrian government forces have cleared nearly half of the city’s eastern districts of militants, liberating tens of thousands residents.
On Wednesday, Russian Defense Ministry spokesman Maj. Gen. Igor Konashenkov said the United States, France and the United Nations have failed to offer aid to 90,000 Aleppo residents liberated from militants.
Syria's civil war between government forces and a wide range of insurgents, including opposition groups and terrorists, such as Daesh and Jabhat Fatah al Sham (also known as the Nusra Front, or Jabhat al-Nusra), both outlawed in Russia, has raged for some five years and has claimed hundreds of thousands of lives.