It is yet unclear exactly how many people were on board, but the aircraft usually operates with a crew of four, according to the Naval Air Systems Command, Sputnik reported.
The helicopter was embarked aboard the aircraft carrier USS Abraham Lincoln and crashed after taking off from the ship.
Search and rescue operations are ongoing with multiple Coast Guard and Navy air and surface assets. More information will be posted as it becomes available.
Marine Traffic showed several US Navy warships assisting in search and rescue operations in the area.
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