Man dies after being found unresponsive on Red Line platform

A man died Tuesday morning on a CTA Red Line platform in the Old Town neighborhood.

The 27-year-old was found unresponsive by a bystander around 5 a.m. on the Clark/Division platform in the 1200 block of North Clark Street, police said.

The witness attempted CPR until first responders arrived, police said.

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The man was pronounced dead at the scene, police said.

Area Three detectives are investigating.