| Children have not been spared in the Syrian conflict |
Air strikes on the Syrian city of
Aleppo have killed at least 28 people, including children, according to
the Syrian Observatory for Human Rights.
| Despairing medical workers, after their hospital was destroyed by barrel bombs |
| Many people were rescued from collapsed buildings, but at least 20 people are still believed to be buried under the rubble |
The Syrian government says western areas of Aleppo, which it controls, have been hit by rebel shelling, killing at least one person.
Aleppo, once Syria's commercial and industrial hub, has been divided since 2012, with the government controlling the western half and rebel factions holding the east.
Life inside rebel-held Aleppo
What is left after five years of war?
Why is there a war in Syria?
Profile: Aleppo, Syria's second city
But in recent months, government forces backed by Russian air strikes have almost encircled the rebel-held areas and cut off one of the rebels' two routes to Turkey. Since the, the government has advanced further on the one remaining supply line.
The battle for the city led to the collapse of a cessation of hostilities negotiated by Russia and the US at the end of February. On Friday, US Secretary of State John Kerry and his Russian counterpart Sergei Lavrov said they had agreed on "concrete steps" to salvage the failing ceasefire.