Metro-North service in and out of Manhattan is suspended due to a large fire under the 138th Street Bridge, on the Manhattan side. According to NY1, the sound of an explosion was heard before the fire started, but no train cars were involved in the fire. A photo on Gothamist shows that the huge plumes of smoke are easily visible from Midtown, four miles away. It is not yet clear when Metro-North service will be reinstated.
Update: The bridge has been reopened and trains are running into Grand Central, reports Second Avenue Sagas. Rush hour plans remain to be determined.