The Islamic State terror group has been making use of a chemistry lab in Iraq’s University of Mosul — which it seized nearly two years ago — to test and build deadlier bombs, military officials and other sources told The Wall Street Journal Friday.

The report comes as analysts warn that ISIS soon could get its hands on the materials necessary to build and deploy a radioactive “dirty” bomb.

“The University of Mosul is the best Daesh research center in the world,” Gen. Hatem Magsosi, Iraq’s top explosives officer, told the Journal, using another name for ISIS. The terrorists used the lab to crank out chemical weapons, peroxide-based bombs and suicide vests similar to the the ones used by the attackers in Belgium and Paris, military officials said.

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Image courtesy of Iraqi News