Many Hillsboro residents heard an explosion at approximately 10 a.m. April 8.
The chain of events leading to the explosion began at approximately 3:30 p. m. April 7, when a grenade of unknown origin was discovered near the intersection of Co. Hwy. F and Wernick Ave. The Hillsboro Police Department was notified.
Hillsboro police then contacted the Vernon County Sheriff’s Office in Viroqua, which dispatched deputies to keep watch over the grenade until April 8, when members of the 115th EOD (Explosive Ordnance Disposal) arrived from Madison.
The grenade was wrapped and placed in a box for such items and transported to the far end of Firemen’s Memorial Park. There, C4 explosive was placed on top of the grenade in a hole dug to a depth of 14 inches. The hole was not dug deeper because of the frost depth in the ground.
Police Chief Tom Richardson detonated the C4 explosive. It was believed that the grenade was live.
No one was injured in the incident.