Service was temporarily terminated Friday afternoon at Brigham Circle in Boston due to a power problem on the MBTA's Green Line E branch.
Smoke could be seen coming from a manhole in the 800 block of Huntington Avenue, and police and fire officials appeared to have a portion of the street shut down.
Affected stops included Brigham Circle, Fenwood Road, Mission Park, Riverway, Back of the Hill and Heath Street. Commuters were encouraged to use Route 39 for alternate service for Heath Street.
The MBTA announced trolley service had resumed just before 6 p.m. with residual delays of about 10 minutes.
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Further details were not immediately available.