Rescuers hunting Mail columnist Michael Mosley were last night focusing on a treacherous mountain path.
After a day that saw divers, coastguards and fishermen scouring the sea, the search for the renowned health writer shifted back to land.
Greek police are now working on the assumption that the 67-year-old diet guru took a disastrous wrong turn as he walked back to his friends’ home on the tiny holiday island of Symi.
One rescuer said the search was becoming a ‘race against time’ as it entered a fourth day.
The mystery of what has happened to the father-of-four, familiar to millions through his newspaper column, TV work and books, deepened yesterday as CCTV showed him wandering through a port town after leaving his wife, Dr Clare Bailey, and friends at a beach.
Images released by police that appears to show Dr Mosley resting an umbrella on his shoulder while dressed in a dark shirt and a cap
They are timestamped 1.52pm and were taken from the Blue Corner in Pedi, a fishing village about fifteen minutes walk from St Nicholas and around a quarter of the way through the walk
A map of the route the doctor is thought to have taken and the last sightings of him
Pictured is the exerior of the Blue Corner Cafe, where Dr Mosley was seen walking past on CCTV footage
A camera crew is seen recording in front of the Blue Corner Cafe in Symi
The search for Dr Mosley continues with more officers, dogs and drones
Dr Mosley was seen dressed in a blue shirt and shorts resting a purple umbrella on his shoulder to shield himself from sun as he strolled past a cafe less than half an hour after telling Dr Bailey he would walk back to their accommodation.
The confirmed sighting indicated he had made it away from the coastal path making it less likely he had fallen into the water.
Later on, after another possible sighting, officers turned their attentions to a mountainous strip of land between the port of Pedi and the holiday home he was staying at in Symi town.
‘It is the first solid lead we have and the entire weight of the search is now shifting to that area,’ a police official said.
‘He probably lost his way and ended up in this windy, uncharted path that links the two regions of Pedi and [Symi town], winding through a craggy mountain.’
It comes as the British doctor’s four children flew out to Greece to help solve the mystery that has baffled locals. Dr Mosley and his wife landed on the 25-square-mile island on Tuesday and were due to stay for a week with a couple who have a holiday home there.
The following day, the group got a boat-taxi to Saint Nicholas Beach. Dr Mosley had a swim before setting off in 37C (98F) heat along a well-trodden coastal path to Pedi at around 1.30pm.
This is the picture of Dr Mosley posted with an appeal after he went missing while walking on holiday in Greece on Wednesday
Fire crews use a drone to help in their search for the TV doctor
Fire Department officers inspect an area, following the search for missing British TV doctor Michael Mosley
Firemen and a police officer who are involved in the search for Michael Mosley stop to talk to someone who appears to be a local resident
A rocky path near Saint Nikolas Beach in the Pedi district in Symi, Greece, where a search and rescue operation is under way for Dr Mosley
Police believe Dr Mosely walked back along the path to the house he was staying in Symi Town
Terrain near the pathway to St Nikolas Beach, where Dr Mosley set off hiking
Police understood he planned to take a bus from the small port town back home – but he never made it.
Officers have retraced his steps, going door to door and speaking to businesses and homes along the path he’d taken.
They managed to recover CCTV pinpointing Dr Mosley at Kamares