Heavy air strikes resume on Aleppo, Syria

Russian planes have resumed air strikes on rebel-held districts in the city of Aleppo, in what activists say is the heaviest bombardment in days. At least 25 people are reported to have died, including children.

The bombardment follows a temporary lull called by the Syrian government, partly to allow civilians to leave rebel areas in the east of the city.

It has come under intense aerial attack since a ceasefire brokered by the US and Russia collapsed last month.

The air strikes came as Russian President Vladimir Putin cancelled a planned visit to France.