Numerous social media users are reporting hearing a "loud sound" or "explosion" near The New York Fed in Lower Manhattan... @EddieWard8 notes that "Just heard loud boom sound in lower Manhattan 5 mins ago. Sirens/police now on the way..." NYTimes' Shane Goldmacher tweeted..."I’m in lower Manhattan and we just heard a very loud sound, akin to an explosion a couple minutes ago. Police active nearby" And noted "fire trucks converging near Liberty St and Maiden Lane..." right where The New York Fed is... Fire and Police are on scene...