According to the Chicago Sun-Times, officers were called to the 7500 block of North Paulina Street around 11:25 a.m. Monday. There, they found an unidentified 58-year-old woman unresponsive aboard the train, and she was pronounced dead shortly afterward. Police told the paper that Area 3 detectives are handling the investigation.

The 120-year-old station is one of the CTA’s most heavily used and serves the Purple, Pink, Brown, Orange and Pink Lines.

The State and Lake CTA station in Chicago is set to undergo a $444 million renovation project to replace the existing structure with a more modern and accessible one, with an expected completion date of 2029.

A death investigation is under way following the death of a woman found unresponsive aboard a CTA L train Monday morning on the North Side.