Air strikes on city of Aleppo in Syria have killed at least 28 people, including children. The attacks, reportedly by Syrian or Russian warplanes, were on rebel-held areas in the east of the city.

According to the Syrian Observatory for Human Rights, barrel bombs were dropped on several areas. In one neighbourhood, a hospital was hit in the bombing, wounding some staff and patients.

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.