Police searching for missing Gaynor Lord have found her coat in the River Wensum.
The mother-of-three went missing last Friday and police now believe she entered the water.
Specialist underwater dive teams have been brought in to support the search.
CCTV showed Gaynor leaving her job at Bullards Gin via Bedford Street at 2.45pm an hour before she was supposed to finish her shift.
Wensum Park has been closed since Saturday as specialist teams have carried out extensive searches of the area including the River Wensum.
Gaynor’s clothing, two rings, mobile phone and glasses were found across the park and her coat has now been found in the water.
Police believe the most likely scenario is that Gaynor has entered the water due to where her clothing and possessions were found.
Norwich policing commander, Superintendent Wes Hornigold, said: “Gaynor left work early and didn’t take her normal route home.
"We haven’t been able to establish why she left early and her disappearance is out of character so we are naturally concerned for her welfare.
“There IS no evidence that Gaynor has come to harm and while we have a number of enquiries ongoing, given where her clothing was found and other items, there is a real possibility she has entered the water.
“We’ve been liaising with the National Crime Agency (NCA) who have given advice around specialist underwater dive teams and we’re seeking assistance from forces with this capability. We hope resources will be on the ground later today or tomorrow.
“This is clearly a distressing time for her family. We have specialist officers supporting them and continue to keep them updated of our ongoing work.”
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The river has become the area of focus for the investigation as a request for specialist underwater search teams has been made who are set to arrive today or tomorrow.
The search has been carried out with assistance from the force’s Marine Unit, Norfolk Fire and Rescue Service and the Coastguard.
Gaynor is described as white, 5 ft 6 tall, and was wearing a white shirt and yellow tank top with a large olive-coloured coat over the top and a scarf.
She has blonde shoulder-length hair in a bob.
Anyone with information or who knows of her whereabouts should contact Norfolk Constabulary on 101 quoting incident number 427 of December 8.
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