Filling in for the Red Line today is the Blue Line

UPDATE, 5:15 p.m.: Whatever the problem was, it's fixed now and trains are starting to roll again.

A broken (still under warranty?) train at Government Center is raising heck with the Blue Line commute this afternoon.

At 4:45, Glenn Tremblay tweeted that there were "swarms of people waiting outside Government Center."

Shortly after 5 p.m., David Guarino reporte: "Blue Line at standstill. Broken down train, speakers say, shuttle buses between Aquarium and Maverick."

But two minutes later, Lauren Bettencourt at WBZ-TV reported the issue was the power supply, not a train and that the T had fixed it and was running a test train before starting up service again.