Police have confirmed that following initial investigations the device found at a property in Newton Abbot is not viable.
A 200 metre cordon put in place around the address in Tudor Road has now been lifted.
Residents evacuated from nearby properties have been allowed to return to their homes.
In a statement, Devon and Cornwall Police said: "We can confirm that following initial investigations, the device found at Tudor Road, Newton Abbot, is not viable.
"Therefore, the cordon will be lifted and residents from the evacuated properties will be allowed to return to their homes. We thank them for their patience and co-operation in this matter.
"Devon and Cornwall Police will continue to support the Metropolitan Police with their investigation.
"Further forensic searches will continue at the property in question. A police scene guard will remain in place whilst this work continues."
See also http://www.theexeterdaily.co.uk/news/business-daily-local-news/suspicious-device-found-newton-abbot