Syria conflict: Aleppo 'chlorine gas attack' investigated
Friday, 12 August 2016 - 8:22
The UN is investigating evidence of a toxic gas attack on a rebel-held area of the Syrian city of Aleppo.
Rebels said the attack - which reportedly left four people dead and many injured - was carried out by government forces using chlorine gas.
The UN special envoy for Syria said a chlorine attack, if confirmed, would amount to a "war crime".
Footage obtained by the BBC shows people with breathing difficulties receiving treatment at a hospital.
Men, women and children are shown being fitted with oxygen masks by medical staff.
The gas is thought to have been chlorine dropped in a barrel bomb, said the Syrian Civil Defence - volunteer emergency response workers who operate in opposition-held areas.
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