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Commuters spooked by firecracker in CTA tunnel

Authorities say someone set off a firecracker in a tunnel that connects two Chicago Transit Authority underground train lines, sending spooked commuters scrambling for the exits.

The incident occurred around 6:40 p.m. on Tuesday.

Chicago Transit Authority spokeswoman Sheila Gregory says police found a firecracker in the tunnel that connects the Blue Line with the Red Line at the downtown Jackson Street station.

She says there were no injuries or service interruptions.