The deadly crash happened on Wednesday at about 5:47 p.m. on 21st Place between 50th and 49th avenues, the spokesperson said.
ABC7 was told a man was riding his bike when he was struck by a CTA Pink Line train.
The man has not been identified by suburban authorities.
CTA said Pink Line trains were running with delays due to a "medical emergency on the tracks near Cicero."
No other information was available.