ANTHON, Iowa (AP) — The Woodbury County Sheriff’s Office says a suspected pipe bomb was found near a water tower in the western Iowa city of Anthon. The Sioux City Journal reports someone found the bomb Tuesday afternoon and brought it to Anthon City Hall. Sheriff’s office Maj. Greg Stallman says after the person brought the pipe bomb to City Hall, authorities established a perimeter around the building.

The State Fire Marshal’s Office and Bureau of Alcohol, Tobacco, Firearms and Explosives also were called. Stallman says authorities used a fire marshal’s device to move the explosive to a secluded area, where it was “disrupted.” Stallman says it sounded like a shotgun blast when the pipe bomb was detonated.

Authorities continue to investigate the matter. Anthon is about 25 miles east of Sioux City.