The assault took place Monday at the Forest Hills stop in Jamaica Plain, according to police.
A 14-year-old girl was indecently assaulted and threatened with a knife late Monday afternoon at the MBTA’s Forest Hills station in Jamaica Plain, according to Transit Police.
The assault occurred at 4 p.m., police said, and the same person was allegedly responsible for both acts.
After an investigation, officers arrested a juvenile male the following day.