Downtown Green Line service was disrupted after a small fire near a wire above a train forced the MBTA to shut down the line between the Government Center and Arlington stations.
Boston district fire chief Paul Burke said the fire above the train around 1:10 p.m. knocked the power out to the train at the Boylston Street station and also stopped two other trains in the tunnel. Power was restored with an hour.
Around 4:45 p.m., the MBTA tweeted that service between the Government Center and Arlington stations had resumed.
Burke said there were two minor injuries.
He said there were 100 people on each of the three trains who had to walk through the tunnel and leave the stations.
One of the trains was approaching Park Street, and the other train was between Boylston and the Arlington station, Burke said.
MBTA spokesman Joe Pesaturo said, “A very small fire was confined to a wooden trough that sits below the overhead wire.”
Pesaturo said passengers were taken off the trains because the trains could not move. Photos and videos on social media showed passengers walking through tunnels.
He said the MBTA’s Power Department personnel found a defect in the overhead wire that requires repair work.
Steve Annear contributed to this report.