A disposal operation is under way near Cambridge after a second unexploded World War II bomb was found.
A bomb disposal team was called in to deal with a second bomb
A cordon around the Brookfield farm site between Oakington and Longstanton is in place after Monday's discovery.
A RAF bomb squad team is also on site. As yet no-one has had to leave their homes but police are warning people to stay away from the area.
About 80 houses were evacuated after archaeologists unearthed the first device which was made safe on Sunday.
Bomb disposal experts from RAF Wittering spent Saturday and Sunday making the 500lb bomb safe.
The archaeologists were investigating a suspected ancient settlement when they found the bomb on Friday afternoon.
The latest one was found in a field near the first.