About 2,600 properties were evacuated on Saturday before an operation to clear a World War II air bomb in Exeter in the south-west of England.
According to police, the bomb was discovered on Friday near the campus during construction work.
The bomb will be explored and then destroyed by an army sapper in a controlled explosion.
The surrounding area is also closed to traffic.
The police have informed that the operation should end by the evening, and have acknowledged that in such an emergency situation, non-compliance with the norms of social distancing established due to the pandemic is permissible.
Unexploded World War II airstrikes are still uncommon in Britain, although not as often as in Germany.