Firefighters were battling a massive blaze on a US navy amphibious assault ship in San Diego, California, on Sunday night.
The fire erupted after an explosion on the USS Bonhomme Richard shortly before 9am local time.
Ariel photographs showed giant plumes of smoke billowing out from the ship, which was docked in its home port.
The reasons for the blaze, which was caused by fuel catching fire, remained unclear. There was no suggestion of terrorism being involved.
Emergency services cleared the area as firefighters moved in to try to bring the fire under control.
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