Syrian government forces have been accused of dropping barrel bombs containing chlorine from helicopters on a suburb of Aleppo, injuring 80 people.
Volunteer emergency workers say people suffered breathing difficulties after an attack on the Sukari area.
20:51 Syrian army's Aleppo advance slows, but victory in sight13
17:54 Syrian Army suspends active military operation in Aleppo – Russian FM12
12:11 Syrian Forces Said to Drive Deeper Into Rebel-Held Aleppo11
09:18 Syrian government troops, allied militiamen seize more ground in Aleppo17