'US believes ISIS likely used chemical weapons in Iraq attack'
"We have credible information that the agent used in the attack was mustard," a senior US official told the 'Wall Street Journal'.
Employees of the Research Institute for Protective Technologies, Nuclear, Biological and Chemical Protection (WIS) inspect a dummy sample which is contaminated with a substance similar to the chemical weapon Sarin.(photo credit: REUTERS)ByREUTERSUpdated: