A group of ISIS militants have been arrested before being able to stage a chemical weapons attack against Iraqi army forces in western Mosul.

According to Al-Sumariyah News, an intelligence source said on Sunday that the terrorist cell was arrested while the Iraqi government forces were patrolling al-Sihha district in Western Mosul in Nineveh province.

The source added that amounts of toxic substances were found within the group’s possession.

Since the government launched an operation to retake Mosul from the terrorist group, ISIS has used chemical weapons several times against the Iraqi forces and civilians in the city.

Back in January, the Iraqi defense ministry announced that ISIS has lost over 50 percent of its militants in the city of Mosul in Nineveh province as Iraqi troops have managed to recapture the eastern part of the strategic city.

“The intelligence obtained by us indicates that there have been over 6,000 ISIL terrorists in Mosul and around 3,400 of them have been killed in battles with Iraq's joint military forces in the major city of Nineveh province,” Iraqi Defense Ministry Spokesman Colonel Laith al-Naimi said.

He also said that over 250 bomb-laden vehicles and the entire bomb-making workshops of the terrorist group have been destroyed in Mosul.