(NBC News) One Navy SEAL is dead and another has been injured after colliding in mid-air during a parachute training exercise in the Arizona desert, ABC News reports.

The SEALs were doing “routine military free-fall training,” according to Kenneth McGraw, a spokesman for U.S. Special Operations Command.

The incident occurred over the U.S. Special Operations Command parachute testing and training facility at Pinal Airpark, Arizona, according to CNN.

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