The street was closed to vehicles and pedestrians, Metro-North said.
MTA and Norwalk police were responding.
As a result, substitute bus service was being provided on the Danbury Branch for the 7:24 p.m. train departing South Norwalk making all stops to Danbury.
Metro-North reported wire damage in the vicinity of Merritt 7. Riders should listen for announcements at the stations.
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