Police will continue searches along and in the River Tyne as they try to locate Northumberland woman Sally Allan, who disappeared early on Boxing Day.
Since she was reported missing, officers have been reviewing CCTV footage of Sally's last known movements on the morning she went missing.
The footage shows Sally walking alongside the River Tyne underneath the Swing Bridge on Newcastle Quayside at around 6.15am on Boxing Day, after the 59-year-old had walked the 11 miles from her home in Errington Road, Darras Hall, Ponteland.
She was seen making her way along the riverside towards the rear of the Guildhall. But there is no CCTV evidence of her leaving the area.
Further inquiries have been carried out which have led to search efforts being concentrated in the water itself with specialist officers from the marine unit supporting the investigation.
Chief Inspector Steve Readdie said: "This is an incredibly difficult time for Sally's family and I know they have been overwhelmed by the level of support shown by the public.
"We have been reviewing CCTV footage alongside the family. This footage has led to our search efforts being concentrated on a small stretch of the river Tyne at the Swing Bridge.
"Our marine unit will continue to search in the water, and along the river banks, for any sign of Sally or any clues that could help trace her whereabouts.
"Inquiries are continuing today and we will continue to support the family at what is an understandably distressing time."
Anyone who may have any information that could help with the enquiry are asked to contact police on 101.