A man was found dead early Sunday at the Clark/Lake CTA station in the Loop, police said.

Officers responded about 11:05 a.m. to a call of a person down at the station at 124 W. Lake St., according to Chicago Police. They found the 51-year-old unresponsive on the second-floor platform.

He was taken to Northwestern Memorial Hospital, where he was pronounced dead, police said.

An autopsy Sunday did not immediately rule on a cause and manner of death pending further investigation, according to the Cook County medical examiner’s office.

Area Central detectives are conducting a death investigation.