| Attacks continued on Tuesday and one air raid killed 12 people from two families, activists say |
The US has pledged to provide $364m (£276m) more in humanitarian aid to people affected by the war in Syria.
| Residents of eastern Aleppo have described intense bombardments |
And the World Health Organization has called for safe evacuation routes out of the city for the injured and sick. A spokeswoman said there were only 35 doctors left to care for hundreds of trapped patients, and the number of casualties was rising.
Medical supplies were running out and there was a shortage of blood, she added.