BYRON TOWNSHIP, Mich. (WOOD) — It’s official: the big boom heard across southern Kent County last weekend originated from explosive target shooting at a bachelor party.

The Kent County Sheriff’s Department confirmed the source of the sound Thursday.Deputies said they talked to the people responsible for the boom, which happened when they fired a high powered rifle at Binary X, a material used for exploding targets.

24 Hour News 8 received hundreds of reports about the loud sound about 8:30 p.m. Saturday, mostly centered in the Grandville and Wyoming areas. Kent County dispatchers said they also handled dozens of calls about the loud explosion-type sound.

A tip led authorities to the 7100 block of Wilson Avenue SW, where the explosive shot was fired.

Deputies said they are not seeking charges in the case. They said the group followed the law when it came to transporting and detonating the materials used.