The Dane County Bomb Squad determined that a backpack found in the store did not contain any bomb-making materials or explosives, Janesville police said.
An employee of a thrift store in Janesville, Wisconsin discovered a live cluster bomblet and ammunition among donated items Friday morning, WKOW-TV reported.
Authorities in Janesville, Wis. are attempting to locate the person whose donation to a Goodwill retail location included live ammo and an explosive device police are calling a "cluster bomblet."