Mustard gas used in Iraq in August: sources close to OPCW

Mustard gas was used in two attacks in Iraq near the Kurdish capital of Arbil in August last year, sources close to the world's chemical watchdog said today.
"The results of some sampling have confirmed the use of mustard gas," one source said, referring to an investigation by the Organisation for the Prohibition of Chemical Weapons. Iraqi Kurdish authorities at the time said the attacks were carried out by Islamic State group fighters.