Syrian activists say 25 killed in government airstrike

Opposition activists in Syria have said that 25 people have been killed in a government airstrike in the north of the country.

They said two children were among those who died in al-Bab - a town just to the north-east of Aleppo.

Activists posted footage online purporting to show the aftermath of the strike, but it has not been independently verified.

The BBC's Jim Muir reports from Beirut.