In this Feb. 11, 2016, file photo, civilians walk with containers for fuel and water in Aleppo, Syria. Syrian rescue worker says three civilians, a mother and two children, died in a suspected chlorine gas attack on an opposition-held district in the city of Aleppo. The report, which was posted online on Thursday, Aug. 11, could not be independently verified and it was not clear how it was determined that chlorine gas was released. Alexander Kots/Komsomolskaya Pravda via AP, File