Smoke at Harvard wasn't that dire; T says the train wasn't on fire

Sure, Harvard station filled with smoke shortly after 8 a.m., but after getting the offending train out of the station, the MBTA responded to several people alarmed by the possibility they were on or near a flaming train:

Good morning, there was no fire on the train at Harvard. A mechanical issue did cause smoke to emit from the last car, and the train was removed from service.