The head of a specialist underwater rescue team brought in to help look for missing mum Nicola Bulley believes her phone may have been left on a bench as a "decoy".
Forensic expert Peter Faulding said it is the most "unusual" case he has seen in two decades of working. Friends and family have arranged for Mr Faulding's private diving team Specialist Group International to aid the police search, Wales Online reports.
No clues were uncovered during a search of the river on Monday, and more investigations near the scene of the bench where Nicola's phone was found are being carried out on Tuesday. Mum-of-two Nicola, who had been walking her dog Willow by the River Wyre in Lancashire, has now been missing for 11 days.