U.S. Special Operations forces conducted a raid in eastern Syria overnight and killed Abu Sayyaf, a senior ISIS commander, sources familiar with what happened on the ground in Syria told CNN.

Sayyaf was in charge of ISIS’ oil and gas operations and directly and increasingly involved in ISIS command and control. U.S. forces intended to capture him, but he fought and was killed in the raid, the sources said. His wife was captured and taken to Iraq for interrogation.

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