Latest: Mother and children among dead in suspected chlorine gas attack in Aleppo

Three civilians - a mother and two children - have died in a suspected chlorine gas attack on an opposition-held district in the city of Aleppo, a Syrian rescue worker said.
Khaled Harah, a first responder, said a government helicopter dropped four barrel bombs on the Zabadieh neighbourhood last night, and one of them released chlorine gas.