Metra trains on the Burlington Northern Santa Fe line were halted Saturday night near west suburban Cicero while a bridge was inspected for possible structural issues.
Trains 1322 and 1321 were stopped due to structural concerns on a bridge near the Cicero Avenue station, Metra said in an alert about 9:30 p.m.
Trains had to be stopped while an inspector was sent to check out the bridge after a piece of concrete fell, Metra spokeswoman Katie Dahlstrom said.
The trains were moving again just after 10 p.m., but were running 40-70 minutes behind schedule, Metra said.
The bridge was checked and cleared for trains to safely cross, Dahlstrom said.