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The Defense Department says a new round of airstrikes by U.S. fighter jets and unmanned drones has targeted Islamic militants in Iraq.

U.S. Central Command says the strikes destroyed armed vehicles, including one that was firing on Kurdish forces in the approaches to the city of Irbil, and a mortar position.

The military says the airstrikes took place from about 2:15 a.m. Eastern Daylight Time Sunday to about 5:45 a.m.

It was the fourth round of airstrikes against Islamic State forces by the U.S. military since they were authorized by President Obama.

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