Army experts were called to Aberdeen Airport after a suspected Second World War bomb was found.
The device was discovered at the airport at around 9am on Monday during work to extend the runway.
The Army Explosive Ordnance Disposal team from Edinburgh was called in and removed the device, which was not live.
It is thought it could date from the Second World War when the airfield was an RAF base.
An airport spokeswoman said there was no impact on flights or the extension works as the device was found in a remote part of the airfield.
She said: "The airport has such a rich military history we were always going to find things like this, but we've found very little over the course of the extension project.
"We have procedures in place for dealing with this kind of thing."
An extra 124 metres is being added to the runway.
The project is expected to be complete in time for the summer season of 2012.
It is hoped that the 124-metre extension to Aberdeen airport's runway will improve economic growth in north-east Scotland by opening up new routes and attracting more businesses and tourism to the area