ISIS mortars show traces of mustard gas: U.S. military
Official says more tests on fragments from attack in Iraq are underway to confirm preliminary results
A senior U.S. military officer says preliminary tests show traces of the chemical agent sulfur mustard on mortars that ISIS militants used to attack Kurdish forces in Iraq.
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U.S. Brig.-Gen. Kevin Killea, chief of staff for the military operations in Iraq and Syria, says the field testing is not conclusive, so final tests are underway to get the full make-up of the chemicals on the fragments.
U.S. officials have been looking into reports that Islamic State militants used the chemical weapon mustard gas in the Aug. 11 attack in Makhmour. Similar reports surfaced in July.
Killea told Pentagon reporters on Friday that Kurdish forces brought the mortar fragments to U.S. forces for testing, so there may be questions about the chain of custody of the evidence.