A military device in a donation box injured an employee at a South Austin Goodwill store Tuesday evening in an incident that local and federal authorities determined was not related to the bombings that have recently jolted Central Texas.

An employee of the Goodwill at 9801 Brodie Lane found an artillery simulator – a device meant to simulate the deafening “bang” noise of an explosion for the purposes of military training – in a box of donated items and it detonated in his hand, Austin police Assistant Chief Ely Reyes said. The victim, a man in his 30s, was treated at St. David’s South Austin Medical Center and released within a couple of hours, according to a hospital spokesperson.