The UN on Thursday (September 29th) warned that "hundreds" needed medical evacuation from opposition-held eastern Aleppo, and that there was only enough food aid left for a quarter of the city's population, AFP reported.

"Utmost on our mind is the need to address the very concerning medical situation" in the east of Aleppo, said UN deputy envoy for Syria, Ramzy Ezzeldin Ramzy.

"Medical evacuations are urgently needed," he said, a day after two of the largest hospitals in the city's east were bombed, prompting UN Secretary General Ban Ki-moon to describe that attack as a war crime.

Ramzy warned that medical supplies were running dangerously low and only around 35 doctors remained in eastern Aleppo, where an estimated 250,000 people have been under regime siege since early September.

"As many as 600 wounded cannot be provided with adequate treatment," Ramzy said.

He also cautioned that "food stocks are running low", with many bakeries closed and only 14,000 food-aid rations remaining.

With each of those rations enough to feed five people, that would be sufficient for 70,000 people, or only about a quarter of the population, according to the UN's World Food Programme.

"We hope it will be possible to create conditions for (aid) deliveries to be made. The UN continues to be ready to deliver humanitarian assistance including medical supplies as soon as possible," Ramzy said.