A suspicious vehicle at RAF Mildenhall prompted the closure of the A1101 this morning.
Security officials were alerted by a military working dog during the routine search of a delivery truck at 8.30am.
During an inspection of the vehicle a potentially harmful substance was found.
As a result the A1101 was closed between Field Road, Mildenhall, and St John’s Street, Beck Row, and access to the base from the main gate was prohibited.
Following a thorough search of the vehicle, security personnel resolved the concerns and the road was reopened.