
An MBTA Red Line train experiencing a mechanical problem prompted delays along the line in Boston's Dorchester neighborhood Tuesday morning, the agency said.
The MBTA didn't immediately say what kind of problem the train had near JFK/UMass Station, but noted 20-minute delays on the Red Line for about an hour.
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Riders replied to the MBTA's tweets about the delays by saying that they were experiencing longer waits.
The delay comes a day after the MBTA opened the long-awaited Green Line Extension to Medford.
The MBTA's Green Line now extends into Medford after the completion of a long-term project.