ANN ARBOR, Mich., Feb. 12 (UPI) — A postal worker found two inert hand grenades in a package at the post office inside the federal courthouse Wednesday.
The Bureau of Alcohol, Tobacco and Firearms was called in to investigate.
The grenades were in a package addressed to an Ann Arbor man from an Army surplus store in Minneapolis. The contents were discovered when the package broke open.
Police brought in bomb-sniffing dogs and evacuated the building for about 15 minutes.
No injuries were reported and no charges were expected to be filed.