A 24-year-old man has been arrested on suspicion of a bomb hoax following the discovery of a suspicious package in Hailsham.
A cordon was put in place on Monday night and nearby residents were evacuated from their homes near 'The Diplocks'.
Explosive Ordnance Disposal (EOD) unit carried out an examination and conducted a controlled explosion.
Sussex Police have since lifted the cordon and allowed people back to their homes.
The man, who is said to be local to the area, remains in custody and investigations continue.