Michael Gann is accused of making at least seven explosives in NYC, and throwing some off the Williamsburg Bridge​ into the East River.

Michael Gann also stored shotgun shells and at least five other improvised explosive devices on rooftops in SoHo, prosecutors said.

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,