Test of ISIS mortar fragments shows chemical arms traces, US general says

Fragments from a mortar fired by Islamic State militants at Kurdish fighters in Iraq earlier this month tested positive in a US military field test for the chemical weapons agent sulfur mustard, a US general said on Friday.
Marine Corps Brigadier General Kevin Killea, chief of staff for operations against Islamic State, said the field test was not conclusive proof of chemical weapons use, and the fragments are currently undergoing more definitive testing to confirm the finding.