Hundreds of homes have been evacuated by police after an unexploded bomb was found in Great Yarmouth.
It was discovered by workers at a construction site earlier today as officers race to clear the area.
Norfolk Police said the discovery in the River Yare was understood to be an ordnance device.
Norfolk County Council state the suspected bomb was found by a contractor working on the new river crossing.
"The site team found what they believed to be an unexploded device this morning while excavating in the vicinity of bollard quay," they said in a statement.
"They immediately evacuated the area and called the emergency services.
"Site workers made the discovery while excavating in the area of Bollard Quay".
More than 100 homes are currently being evacuated as police knock on doors to advise residents to leave for their own safety.
The Explosion Ordnance Device team from Colchester, Essex, are at the scene carrying out an investigation.
A spokesman for the Explosive Ordinance Disposal Team said: "We currently have a bomb disposal team deployed and are on assist providing their specialist skills and expertise to assist the police in dealing with this matter."
The coastguard has put a cordon in place by Southgates Road and Newcastle Road across the river.
The £121million third river crossing is currently under construction and is expected to be completed later this year.
A number of road closures are in place in the area with buses diverted.
In a tweet, Norfolk Police said: "People are being advised to avoid the Southtown Road area due to an ongoing incident. Part of the road is closed and a 100m cordon is in place."
