Dozens of firefighters were fighting a blaze on top of the Federal Reserve Bank of New York on Saturday night, officials say. The fire broke out sometime before 8:40 p.m. on the roof of the 14-story building at 33 Liberty St. in Lower Manhattan. Video shows numerous fire trucks and firefighters at the scene around 9 p.m. The FDNY said a generator on the roof of the building caused the fire in a chimney.