Syrians trade Khan al-Assal chemical weapons claims

The BBC's James Reynolds says there is scepticism about the claims

Syrian rebels and the government have accused each other of firing chemical weapons, reportedly killing at least 25 people in the north of the country.

A Syrian minister said it was a "dangerous escalation" and the "first act" of a new rebel authority.
However, both a chemical weapons monitoring body and the US said there was no evidence they had been used.
Both sides say the attack happened in the Khan al-Assal region north of the second city, Aleppo.
The US says it is looking carefully at the allegations, while Russia has backed the Syrian government's claims.