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Analyst Note
This image shows one of the two improvised air-delivered munitions (IADMs) containing a chemical payload used in an attack by the Syrian Arab Air Force on 7 April 2018 in Douma, Syria. This image shows how the IADM comprises a cradle surrounding an industrial gas cylinder. These cradles typically incorporate fins, wheels, and lifting lugs. The fins and the wheels of the cradle can be seen in this image (ARES)
External Research
OPCW Investigation and Identification Team in Syria
“In relation to the incident of 7 April 2018, in light of the information obtained considered in its totality, the IIT concludes that there are reasonable grounds to believe that between 19:10 and 19:40 (UTC +3) on 7 April 2018, during a major military offensive aimed at regaining control of the city of Douma, at least one Mi-8/17 helicopter of the Syrian Arab Air Force, departing from Dumayr airbase and operating under the control of the Tiger Forces, dropped two yellow cylinders which hit two residential buildings in a central area of the city.”