Police responded to a report of shots fired on a Green Line train in the first block of East Cermak Avenue at about 5:52 a.m.. Police said two suspects were attempting to rob passengers on the train when shots were fired.
The suspects fled the scene, police said. No injuries have been reported.
Two persons of interest are being questioned by police. CTA trains were bypassing the Cermak/McCormick Place station with shuttle service between 35th Street and Roosevelt Road. Normal service was restored around 8:30 a.m.