UPDATE at 1:31 p.m. ET: WNYC, our member station in New York City, reports the fire has been extinguished.
A fire in the vicinity of the Madison Avenue Bridge -- also known as the 138th Street Bridge -- has affected the Metro-North commuter rail service in and out of Manhattan.
"Metro-North has suspended all train service in and out of Grand Central Terminal because of a fire under a bridge," the New York Post reports.
The railroad said Monday that the fire was under the 138th Street lift bridge, which carries all Metro-North trains in and out of Manhattan.
Trains approaching Manhattan and the south Bronx were being held at the nearest station while the fire was being put out.
The Metropolitan Transportation Authority (MTA) says the Hudson, Harlem, and New Haven lines have been suspended.
According to The New York Times, "officials said they believed that a wooden pier beneath the bridge that serves as a bumped for ships caught fire about 11:38 a.m."