After a four-day search, Greek officials said Sunday they had found the body of Michael Mosley, a British medical journalist and documentary filmmaker who disappeared last week during a trip to the Greek island of Symi.

His body was found on a beach in Agia Marina, Symi Mayor Eleftherios Papakalodoukas said.

His disappearance sparked an extensive search involving firefighters, police and volunteers. Authorities also used dogs and drones, and the Greek coast guard also joined the effort as fears grew that Dr Mosley had been left adrift at sea.

A Greek police spokeswoman, Constantina Dimoglidou, said the mayor, who was on a boat patrolling the coast with reporters from state television channel Ert, saw Dr. Mosley’s body and recognized his blue shirt from recent photographs of him. captured on security cameras.

Dr Mosley, 67, a BBC journalist, arrived in Symi, part of the Dodecanese islands in the Aegean Sea, on Tuesday for a week-long trip. On Wednesday afternoon he told his friends at Agios Nikolaos beach that he would walk back to his accommodation in the town of Symi, local authorities said.

The walk is about two kilometers, depending on the route taken. When hours passed with no sign of Dr. Mosley, his wife, Clare Bailey Mosley, reported him missing to the police.

Search efforts shifted north toward Agia Marina on Friday after footage emerged from security cameras in the village of Pedi, about halfway between Agios Nikolaos and the town of Symi, showing what It appeared to be Dr. Mosley carrying an umbrella.

The terrain in the north, above Agia Marina, is much more rugged and dangerous.

Police said Dr Mosley was not carrying his phone during the walk and was last seen by a witness at a bus stop in Pedi.

“It is devastating to have lost Michael, my wonderful, funny, kind and brilliant husband,” Dr. Mosley’s wife said in a statement Sunday, according to the BBC.

Ms Mosley added: “We take comfort in the fact that he almost made it. He made an incredible climb, took the wrong route and collapsed where the extensive search team could not easily see him.”

Over the years, many British viewers have trusted Dr Mosley, a long-time science and health researcher, for his myth-busting advice on diet, exercise and sleep. Trained as a doctor before entering television, Dr Mosley presented the popular BBC health podcast ‘Just One Thing’ and appeared on the show ‘Trust Me, I’m a Doctor’.

He produced various health and science programs for the station and often offered to experiment in the documentaries he presented. He swallowed parasites and tried magic mushrooms, but was best known for popularizing the 5:2 diet, a form of intermittent fasting that involves five days of normal eating and two days of fasting each week.

He was nominated for an Emmy in 2002 for “The Human Face,” a series that examines the science behind beauty.

More recently, he had premiered two series with British broadcaster Channel 4 investigating obesity in Britain and the nutrition behind everyday consumers’ food purchases. This year he had toured Britain with his wife, also a doctor and health columnist, with a live interactive show focused on healthy living.