“The group responsible for monitoring adherence to the global ban on chemical weapons said Monday that it had contacted Iraq over reports of the possible use of such munitions there. A statement by the group, the Organization for the Prohibition of Chemical Weapons, based in The Hague, came a few days after United States officials said Islamic State militants appeared to have used such munitions, possibly mustard gas, on Kurdish fighters in Iraq. If confirmed, it would be the first known use of the weapons by the Islamic State, which occupies parts of Syria and Iraq.”
Source: Iraq: Monitoring Group to Investigate Possible Chemical Weapons Use by ISIS – The New York Times