Police said a male of an unknown age was found in Lake Michigan at 63rd Street Beach, near Jackson Park, just before 12:30 p.m.
That person was pronounced dead on the scene.
This comes after a person went missing in the water off of 63rd Street Beach one week ago.
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The identity of the person found on Saturday afternoon was not immediately known.
Area detectives are investigating.
Police did not immediately provide further information.