CHICAGO (STMW) — A man was pronounced dead after he was found unresponsive on a CTA train at O’Hare International Airport early Monday.

The man, whose age was not immediately available, was discovered unresponsive on a Blue Line train at the airport about 1:35 a.m., police said.

He was taken to Community First Medical Center, where he was pronounced dead, police said.

The Cook County medical examiner’s office confirmed the fatality, but said he remained unidentified Monday morning.