A number of homes on Drake Road were evacuated April 12 after a live hand grenade was found in one of them.
Police said the grenade was later found to be inert and not in danger of exploding.
Police said they received a call at about 9:42 a.m. from a man who said he was going through his parents’ things, in preparation for the house being put on the market, when he found the grenade.
The grenade was in a box in the attic, police said.
The New Jersey State Police Bomb Squad was called, and surrounding homes were evacuated, police said.
The bomb squad determined the grenade, although banded and pinned, was never in danger of exploding, police said.
Police said the man, who was not identified, told them his father had served in the military in Korea.
Residents were allowed to return to their homes shortly before noon, police said.