Illinois State Police said a tire from a box truck on the Eisenhower Expressway dislodged and ended up on the CTA tracks, causing the first train car to derail.
Blue Line service was suspended for nearly three hours between UIC Halsted and Pulaski due to the derailment. Shuttle buses were put in place to help passengers travel between the impacted stations.
Service on the Blue Line is resuming in both directions after an earlier derailment near Illinois Medical District with residual delays.— cta (@cta) July 18, 2016
Officials said 61 passengers on board the train refused treatment. One passenger was taken to a local hospital with minor injuries.
State police said they are continuing to investigate. No citations have been issued.