A 25-year-old man died Wednesday morning after he was pulled from Lake Michigan near Jackson Park Harbor on the South Side.

Sean Thomas was pulled from the water about 4:45 a.m. in the 6500 block of South Promontory Drive, according to Chicago Police and the Cook County medical examiner’s office.

Thomas, of the 8100 block of South Lafayette, was taken to University of Chicago Medical Center, where he was pronounced dead at 5:47 a.m., according to the medical examiner’s office.

An autopsy Thursday did not rule on his cause and manner of death pending further studies.