A field near a farm in Cambridgeshire has been cordoned off after the second bomb - from World War II - in four days was discovered on the site.
A bomb disposal team made safe the previous bomb
The bomb was found on Monday night near Brookfield Farm in Oakington, where a similar bomb was discovered on Friday.
At 2000 BST police advised people to stay away from the area, but they have decided not to evacuate nearby homes.
Bomb disposal experts, who made safe the previous bomb on Sunday, are to look at the new bomb on Tuesday.
About 80 houses were evacuated on Friday while experts dealt with the 500lb bomb.
It had been discovered by archaeologists who were investigating what they thinks is an ancient settlement.
The site is near a former WWII airbase.