Police responding to explosion of 'unknown origin' in

New York police today said that they were investigating an explosion of "unknown origin" in Manhattan, and that people were being evacuated.

"The NYPD is responding to reports of an explosion of unknown origin at 42nd Street and 8th Ave, #Manhattan. The A, C and E line are being evacuated at this time. Info is preliminary, more when available," the New York police department wrote on their Twitter account.