A builder said he wanted to keep an object he found as a souvenir before he was told it could be a live bomb.
Craig Hodgson was digging up the driveway of an unoccupied house in Toll Bar, Great Casterton, when he discovered the device this morning (Monday).
He called his friend and ex-Army officer Jamie Sutherland, from Peterborough, to see if he knew what the strange object was.
When Mr Sutherland arrived at the scene, he told him it could be a live bomb.
Mr Hodgson then called police at about 12.40pm, who told him to stay far away from it.
Police cordoned off and told residents to remain in their homes as a precaution. An ambulance service car was also called.
The bomb disposal team from RAF Wittering was called. The team took the device away for inspection.
It was initially thought to have been a Second World War bomb but police have confirmed it was an Army training device which was not live.
Describing the incident, Mr Hodgson, who lives in Wittering and runs his own building firm, said: “I didn’t know what it was at first but then I got my mate Jamie, who was in the Army, to come out and have a look at it.
“He told me it looked like a bomb and to ring the police.
“I had picked it up and wanted to keep it as a souvenir but police told me to put it down and stay as far away as I could from it.”
The road was closed to traffic for about three hours while the police and bomb disposal team investigated the incident.
A police spokesman said: “Officers would like to thank local residents and motorists for their patience and co-operation while the incident was being dealt with.”