IS' oil operations in Iraq have almost been shut down by air attacks carried out under the so-called Operation Tidal Wave II launched in October as the focus has shifted away from military targets to oil installations after details of the group's crude production operations were seized in a raid earlier this year, according to the Iraq Oil Report.

The raid conducted in May by American special forces resulted in the IS leader in charge of its oil assets in Syria, known as Abu Sayyaf, being killed and nearly seven terabytes of intelligence data falling into coalition hands.

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