Military Investigating Whether Friendly Fire Killed U.S. Marine in Iraq

The U.S. military is investigating whether friendly fire resulted in the death of a Marine in Iraq over the weekend, officials said.

The death of Marine Gunnery Sgt. Scott A. Koppenhafer represented the first U.S. combat casualty since troops returned to the country in 2014 to battle the Islamic State, The Wall Street Journal reported.

Koppenhafer, 35, of Colorado, was assigned to the 2nd Marine Raider Battalion, based in Camp Lejeune, N.C. He was part of a team comprising American and Iraqi security forces. It was conducting an operation Saturday in Nineveh Province.

He was first reported to have died by small-arms enemy fire. The Pentagon is now looking into whether he was accidentally shot by U.S. or Iraqi forces instead.

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SOURCE: Fox News, Louis Casiano