New York City and State Police said the divers confirmed that an object detected by sonar near the Intrepid Sea, Air and Space Museum is the missing engine.
The airliner's other engine remained attached to the right wing of the plane.
Federal investigators also said they found the remains of what may be a bird in the engine. So far, unconfirmed reports suggest the Airbus A320 crash-landed in the Hudson on Thursday after hitting birds and losing thrust from both engines. All 155 people on board survived.
The rest of the plane has been taken to a New Jersey marina to be studied by investigators.
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