A Long Island man has been arrested and charged after allegedly building and placing multiple explosive devices across New York City — including one left on a subway track, federal authorities said this week.
Michael Gann, 55, was taken into custody on June 5, 2025, after authorities say he planted six homemade explosives in various locations, including on the Williamsburg Bridge subway tracks and the rooftop of a residential building in Manhattan’s SoHo neighborhood. He also allegedly scattered shotgun shells near the rooftop devices.
According to a federal indictment, surveillance footage captured Gann walking on the rooftop carrying a bag believed to contain the explosives. Investigators say he had previously purchased large quantities of chemical components — including potassium perchlorate and aluminum powder — as well as over 200 cardboard tubes and dozens of feet of fuse material in May.
Prosecutors allege Gann constructed at least seven explosive devices, one of which contained about 30 grams of explosive powder — roughly 600 times the legal limit for consumer fireworks. A seventh device was reportedly found on him at the time of his arrest. He later told police he had disposed of the rest of the explosives in a Manhattan dumpster, though officials say that was false.
Investigators also reviewed Gann’s internet history, which allegedly showed repeated searches for how to acquire guns and materials to make bombs. Hours before allegedly placing the first device on the subway track, Gann reportedly posted a cryptic Instagram message: “Who wants me to go out to play like no tomorrow?”
Gann now faces multiple federal charges:
- Attempted destruction of property with an explosive, carrying a minimum sentence of five years and up to 20 years in prison
- Transporting explosive materials, which carries up to 10 years
- Unlawful possession of destructive devices, also punishable by up to 10 years
In total, he could face up to 40 years in prison if convicted on all counts.
U.S. Attorney Jay Clayton praised law enforcement for acting quickly to prevent potential harm: “The safety of New Yorkers is paramount. Thanks to the swift work of investigators, a serious threat was stopped before anyone was hurt.”
