Residents living in several streets in the West Midlands were forced to leave their homes after a grenade was found during a house clearance.
The device, thought to be from World War II, was found in Quarry Bank, Dudley, about 19:00 GMT on Monday.
The grenade found in Coppice Lane was put in the back garden of a neighbouring house and police alerted.
Homes within 100 metres [328ft] of the property were evacuated while an army disposal team made the device safe.
Roads were also closed while the incident was dealt with.
Staff from the Army's Explosives Ordnance Disposal Regiment carried out the work, police said.
Dudley Council made the community centre on Sheffield Street into a rest centre for evacuated residents, but they were able to go back to their homes at 21:20 GMT.
Insp Mark Rushton said: "We apologise for the inconvenience caused to local people during this incident but clearly, with things like this you can't be too careful.
"... Thankfully the whole matter was brought to a fairly swift and, most importantly safe, conclusion."