Laboratory tests confirm that mustard gas was used by the Islamic State terror group against Kurdish fighters in Iraq last year, a diplomat tells Reuters.
A source with the Organization for the Prohibition of Chemical Weapons tells the news agency that tests came back positive for the use of the chemical.
Some 35 troops reported getting sick in August 2015 after the attack near Irbil, the de-facto Kurdish capital in northern Iraq.
According to the agency, experts think IS either pilfered the agent from a Syrian stockpile or produced it on its own.
