CIA director John Brennan has said that Islamic State fighters have used chemical weapons and have the capability to make small quantities of chlorine and mustard gas, CBS News reported Thursday.
"We have a number of instances where ISIL has used chemical munitions on the battlefield," Brennan told CBS News, which released excerpts of an interview to air in full on the "60 Minutes" news program on Sunday.
The network added that he told "60 Minutes" the CIA believes that the IS group has the ability to make small amounts of mustard or chlorine gas for weapons.
"There are reports that ISIS has access to chemical precursors and munitions that they can use," Brennan said.
Brennan also warned of the possibility that the Islamic State group could seek to export the weapons to the West for financial gain.