Police at the Detroit Eastern District station on Gratiot near Gunston got an unwelcome surprise on Friday.
A Port Huron-area man called police after finding what he thought might be a live round from a grenade launcher on the side of a road.
The discovery of three World War II-era hand grenades at a Mecosta County home caused a scare this week.
Authorities say a second grader brought an inert U.S. military grenade to a Lansing-area school for show-and-tell, prompting a lockdown.
The Department of Defense says a Fort Campbell soldier from Michigan has been killed in Afghanistan.