Bomb disposal experts carried out a controlled explosion in Earlston on Monday night.
It was carried out in a field off Haughhead Road around 10pm.
A Police Scotland spokesman said: “Police in the Scottish Borders attended at an address in Haughead Avenue, Earlston on Monday after a member of the public reported the discovery of an unexploded mortar shell.
“The item, which had been found in Westruther, was examined by the EOD (Explosive Ordnance Disposal) before being taken to a nearby field, where a controlled explosion was carried out.
“There was no danger to the public at any time.”
If you have any pictures of the explosion or more information please contact us on 01750 725426 or email Adam Drummond