According to a Russian Defense Ministry’s statement, Russian military experts have found unexploded shells indicating that terrorists in Aleppo have been using chemical weapons in their regular attacks on civilian and Syrian government-held areas of the cityTerrorists in Aleppo are using chemical weapons. Traces of chlorine and white phosphorus were detected during initial analysis of the samples. The use of chemical weapons was sued for many month and in late October, Syrian state media said that poison gas was fired at a government-held area of Aleppo, causing massive respiratory problems among the local population. The use of chlorine as a weapon is prohibited under the 1997 Chemical Weapons Convention, which Syria joined in 2013, after a Russian diplomatic effort. In January of this year, OPCW confirmed the destruction of all chemical weapons declared by the Syrian Arab Republic.