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.
BBC: UN inquiry into ‘gas attack’ in Syria (VIDEO)
A Syrian carries the body of a child following reported air strikes on July 17, 2016 in the rebel-controlled neighbourhood of Maysar in the northern Syrian city of Aleppo.
