Dozens injured in toxic gas attack on Aleppo, Syria, reports say

Dozens injured in toxic gas attack on Aleppo, Syria, reports say  CNNSyria war: Aleppo ‘gas attack’ sparks Russia strikes  BBC NewsRussian warplanes strike rebels after alleged gas attack  Yahoo NewsSyrian planes resume airstrikes amid claims of gas attack in Aleppo  The GuardianFull coverage