ISIS used mustard gas during attack on Syrian military airbase in Deir Ezzor

The Islamic State group, also known as ISIS, used mustard gas to attack Syrian troops during an offensive against a military airport in the eastern province of Deir Ezzor, state media reported late Monday, according to International Business Times (IBT).

The number of casualties from the attack remains unclear, Syrian state media reported, adding that militants aimed to capture the airport, IBT reported.

The news reportedly adds to previous claims that ISIS is using various forms of the poisonous gas to attack targets. The attack comes as the extremist group, which controls large swaths of Iraq and Syria, has been targeted by the U.S.-led coalition as well as by Syrian and Russian forces. ISIS has lost about 20% of its territory in Syria and 40% in Iraq.

"The terrorists fired rockets carrying mustard gas," a statement said on state-owned Ikhbariyah television station, Reuters reported.................

unian.info