United States Attorney for the Southern District of New York, Jay Clayton; Assistant Director in Charge of the New York Field Office of the Federal Bureau of Investigation (“FBI”), Christopher G. Raia ...

Prosecutors say he threw an improvised explosive device onto the subway tracks at the Williamsburg Bridge and stashed others on rooftops in SoHo.

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

Both potassium perchlorate and aluminum powder are precursor chemicals that can be used to make an explosive mixture when combined, the indictment states.

Michael Gann, 55, allegedly assembled at least seven IEDs by mixing potassium perchlorate and aluminum powder, officials said.

He also allegedly ran internet searches, including: "how to make flash powder from household items," and "what to mix with potassium perchlorate to make flash powder," the release said.

According to prosecutors, Gann ordered approximately two pounds of potassium perchlorate and one pound of aluminium powder – precursor chemicals to explosives – online in May, along with over ...

Michael Gann was arrested last month after allegedly placing six explosive devices around the SoHo neighborhood in Manhattan ...

According to prosecutors, Gann ordered two pounds of potassium perchlorate, a pound of aluminum powder, more than 200 cardboard tubes, more than 50 feet of fuses, and other, unspecific items that ...