A Weld County man found a live mortar shell from the Korean War era among his grandfather's possessions.

A bomb squad took the shell and detonated it at an undisclosed site.

The sheriff's department says the grandson, whose name wasn't released, discovered the shell on Friday in a home in the Greeley area.

Authorities didn't say whether the grandfather was still alive or how he came to have the shell.

The grandson's brother, an active-duty serviceman, thought the shell might be live and should be destroyed, so the grandson drove to the Greeley Police Department to report what he had found.