The search for missing TV and radio presenter Michael Mosley has shifted to a remote mountainous area

The search for missing TV and radio presenter Michael Mosley has shifted to a remote mountainous area on the Greek island of Symi. The 67-year-old, known for his TV programs and BBC Radio 4's Just One Thing podcast, vanished on Wednesday while on holiday. Dr Mosley was reported to have left Agios Nikolaos beach by foot on Wednesday at 13:30 local time (11:30 BST), and new CCTV footage seen by PA news agency shows him later entering a mountainous path inland from a nearby village. A search and rescue operation, involving helicopters and drones, has started up again on Saturday morning. At 06:00 local time firefighters started searching a 4 mile (6.5km) radius over a mountainous area that is surrounded by sea, said Manolis Tsimpoukas who organizes searches for missing people on the Dodecanese Islands, of which Symi is apart of.

Asked if there had been any sign of Dr Mosley, he said there had been "nothing". A source directly involved in the search told BBC News the search is focusing on the mountainous area between areas of the island Pedi and Symi. The source described it as "not easy terrain". One theory that has emerged was that Dr Mosley was trying to take a much longer route than previously thought, passing over miles of exposed hillside. Dr Mosley's accommodation was in the main town. CCTV images appear to capture the broadcaster in Pedi's main street holding an umbrella about 20 minutes after leaving the beach. The BBC has seen a second piece of CCTV footage from a nearby premises showing a man wearing the same clothes and carrying the same umbrella which was time stamped at 13:50.

Officials are now understood to be excluding the possibility that the father-of-four came to harm while walking between the beach and Pedi. Separate CCTV, from a house at the edge of Pedi's marina at the far end of the village, shows Dr Mosley later entering a mountain path at about 14:00 local time, PA said. A member of the rescue team described the search as a "race against time" and said he could be "anywhere". "The path is not easy to follow, if he took a wrong turn, he would be lost," she told PA. All patrol boats, private boats and commercial boats near the island have been searching for Dr Mosley, Symi's coastguard said, while Police and firefighters have been using drones and a sniffer dog to try to locate the missing presenter.

Divers have been "looking into the water" with the help of the Hellenic Coast Guard. Symi's mayor Eleftherios Papakaloudoukas said the search will continue until Dr Mosley is found. He added he was unsure why the missing presenter would try to make a long, potentially arduous journey in such heat, but he hoped the presenter was found "safe and alive". Greek police said Dr Mosley left his wife Clare on the beach on Wednesday, before setting off on a walk to the center of the island. His phone was found where he was staying with his wife, who reported him missing, a police spokesperson told BBC News.