Police have issued an appeal for another potential witness in the search for Nicola Bulley.
The mortgage adviser, 45, was last seen on Friday at about 9.20am while walking her brown spaniel Willow.
Since then, a massive search has been launched along the River Wyre in the village of St Michael's, Lancashire.
Lancashire Police have released a CCTV image of a woman they believe was in the area at the time Nicola was last seen.
They described her as wearing a red and white coat with a fur hood, light-coloured trousers and a light bobble hat.
She was walking a small, white dog.
The woman was seen on CCTV at around 8.48am on Allotment Lane, close to where Nicola was last seen and was also seen near to the gate at the end of Allotment Lane.
Police have also stressed that the woman is sought as a witness and nothing more.
Earlier today, police divers returned to the spot where she was last seen to carry out an extensive new search of the area.
A team of divers trawled beneath the surface of the River Wyre while other officers combed the banks and a fire service boat team accompanied by a specialist search dog scoured the water surface.
A member of the public raised the alarm not long after Nicola was last seen on Friday when they recognised the dog running loose without a harness on. The mum's mobile phone was also found nearby.
They phoned the school where Nicola's daughters' attend and staff then phoned her partner Paul Ansell.
He then called the police and a massive search has been ongoing since then.
Nicola is described as white, 5ft 3ins tall, with light brown shoulder-length hair. She speaks with an Essex accent.
She was last seen wearing a long black gilet jacket with a hood, black jeans and olive-green ankle wellies. Her hair was tied into a ponytail.
Supt Sally Riley said: “We know that Nicola going missing has caused a great deal of concern for the wider local community, as well as obviously being an awful time for her family.
“This remains a missing person inquiry and at this time there is nothing to suggest any third-party involvement in Nicola’s disappearance.
“I appreciate that there are unanswered questions about what has happened to Nicola, but I would urge people not to speculate or spread false rumours. We will share updates when we can, but we must be factual.
“Nicola’s family are being kept up to date with events and are being supported by officers.
“We are really grateful for the community’s help and co-operation so far, but I’d like to stress again parts of the riverbank are treacherous, especially after the recent rain, and we would ask that nobody puts themselves in danger and that the police and partner agencies’ efforts to find Nicola are not compromised.
“We now want to speak to the woman pictured on CCTV as we believe she was walking in the area at around the time Nicola was last seen.
"If you know her, or believe this may be you, please get in touch. You may not think you know anything but you might have seen something that could be significant.”
Police have also released exact timings for the day Nicola disappeared:
8.43am – Nicola walked along the path by the River Wyre, having dropped her children off at school
8:50am (approximately) - A dog-walker – somebody who knows Nicola – saw her walking around the lower field with her dog. Their two dogs interacted briefly before the witness left the field via the river path
8.53am – She sent an email to her boss
9.01am – She logged into a Teams call
9.10am (approximately) – A witness – somebody who knows Nicola – saw her on the upper field walking her dog, Willow. Work is ongoing today to establish exactly what time this was.
9.30am – The Teams call ended but Nicola stayed logged on
9.35am (approximately) – Nicola’s mobile phone and Willow were found at a bench by the river by another dog-walker.
Anybody who has seen Nicola, or has information about where she might be, is asked to call 101, quoting log 565 of January 30th. For immediate sightings please call 999.
