Laboratory tests confirmed ISIS terrorists did indeed unleash chemical weaponry on Kurdish forces in Iraq, putting to rest a simmering dispute among global powers.
An official with the Organization for the Prohibition of Chemical Weapons said its just-conducted tests showed about 35 Kurdish troops were sickened by sulphur mustard during battle last August.
The OPCW's findings did not stipulate who unleashed the chemical. But a source said to Reuters the gas had been used by ISIS against Kurds fighting in Erbil.
Political and military analysts said the sulphur mustard either came from a Syrian chemical stockpile, or by ISIS hands after members of the terror group learned by trial and error to develop a crude form of the weapon.
Sulphur mustard, first used during World War I, causes burning in the eyes, as well as skin and respiratory problems.