The decommissioned World War II-era pineapple grenade apparently had been used as a paperweight, Deputy Police Chief Robert Kaiser said Tuesday.
One of the workers at the Goodwill NYNJ Outlet Center on Huyler Street called police Monday night, he said.
They responded along with firefighters and the Bergen County Bomb Squad, which collected the device and deemed it harmless.
Click here to follow Daily Voice Hackensack and receive free news updates.