FNA- Head of Iran's Civil Defense Organization Gholam Reza Jalali warned that the ISIL has gained access to the know-how for the limited production of biological weapons.

"We have received reports saying that the ISIL has gained the tools and know-how for the limited production of biological weapons which have, of course, been damaged during the war fortunately," Jalali said, addressing a forum in Tehran on Tuesday.

He also cautioned about the use of chemical weapons in any future clashes by the terrorist groups, specially ISIL, blasting the US and Europe for supporting them.

Elsewhere, General Jalali revealed that the US has transferred a part of the ISIL forces and equipment to Afghanistan.

The ISIL made extensive efforts to gain access to different kinds of weapons of mass destruction (WMDs) ever since the terrorist group occupied parts of Syria and Iraq.

Media reports said in 2015 that the ISIL is trying very hard to gain access to fatal biological arms, and has killed many Iraqi scientists after they have rejected to help ISIL produce such deadly weapons.

"The ISIL Takfiri militants executed head of the physics department at Mosul University because he refrained from cooperating with them in developing biological weapons," the Arabic-language Al-Sumeriya news website quoted a local source in Nineveh province as saying at the time.

In September 2015, a UN official announced that the ISIL had evidently manufactured and used chemical agents at least four times during attacks on Kurdish forces in Syria and Iraq.

Several reports by the Kurdish forces fighting the ISIL indicated the terrorist group�s use of chemical weapons, sparking an investigation by the UN

A UN official said that at least four ISIL-led attacks using powdered mustard agents have been documented on both sides of the Syria-Iraq border.