Did ISIS kill Iraqis with weapons the US gave to Syrian fighters?

Weapons and ammunition the United States seemingly provided to Syrian fighters were captured by ISIS and turned against America’s own partners in Iraq, including at the bloodiest battles in Mosul and Fallujah.

This according to a report issued on Thursday by the group Conflict Armament Research found that a significant source of weapons recovered from Islamic State in Iraq and Syria were Eastern European countries who sold them to the United States. The Americans apparently retransferred these arms to Syrian armed opposition fighters despite non-re-export clauses in the purchasing agreements.

That the U.S. was arming the Syrian rebels through third parties is not unknown, but the CAR report shows the extent to which weapons purchased from EU states and captured from the armed opposition were used against Syrian and Iraqi forces.

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