A 55-year-old man was indicted Tuesday after creating and placing at least seven improvised explosive devices in different areas of New York City, including subway track on the Williamsburg Bridge and on a Manhattan rooftop,

A man accused of making and attempting to use improvised explosive devices in Manhattan is facing multiple charges, according to the United States Attorney’s Office. Michael Gann, of Inwood, assembled at least seven IEDs by mixing potassium perchlorate and aluminum powder,

Michael Gann pleaded not guilty to federal charges of creating and placing explosive devices in NYC, despite allegations of fabricating multiple IEDs and endangering lives.