LOS ANGELES (AP) — A Navy guided missile cruiser hit by a malfunctioning drone during a training exercise is back in San Diego, where investigators will assess the damage and determine what went wrong.

Two sailors were treated for minor burns after the USS Chancellorsville was struck by the drone during radar testing Saturday afternoon, off Point Mugu in Southern California.

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Lt. Lenaya Rotklein of the U.S. Third Fleet said Sunday that the target drone hit the ship’s left, or port, side.

She says investigators at Naval Base San Diego are assessing the damage and determining why the drone malfunctioned.

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About 300 crew members were aboard the ship.

The Navy could not say how the two sailors were injured.

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