 "In this photo provided by the Syrian Civil Defense group known as the White Helmets, Syrians inspect damaged buildings after airstrikes by government helicopters on the rebel-held Aleppo neighborhood of Mashhad, Syria. Photo: PTI")
A United Nations (UN) report issued late on October 21 revealed that government forces in Syria carried out its third toxic gas attack in the north-western Idlib region in March last year.
According to the BBC, the fourth report of the 13-month-long inquiry by the UN and the Organisation for the Prohibition of Chemical Weapons said that investigations reveal helicopters flying from military bases dropping barrel bombs containing a prohibited weapon, chlorine gas.
It said that the helicopter flights could have originated from two bases where the 253 and 255 squadrons, part of the 63rd helicopter brigade, were based.
But the inquiry said that it "could not confirm the names of the individuals who had command and control of the helicopter squadrons at the time."
It added that those "with effective control in the military units... must be held accountable".
The report also accused the government forces of carrying out the toxic gas attack in Qmenas in Idlib governorate on March 16, 2015.
The use of chlorine as a weapon is prohibited under the 1997 Chemical Weapons Convention, which Syria joined in 2013.
