American tourist missing for several days on Greek island

Greek authorities are searching for an American tourist who went missing after hiking alone on the island of Amorgos.

Local authorities say Albert Calibet, 59, has been missing since Tuesday afternoon, when his friend reported him missing after he failed to return from a hike.

Several agencies are involved in the search for Mr Calibet, including coast guard volunteers and teams from the neighboring islands of Paros and Naxos, according to Greek public broadcaster ERT News.

His disappearance comes a few days after that of British presenter Michael Mosley on the Greek island of Symi, where his body was found four days later.

The BBC has contacted the US State Department for comment.

Authorities are searching both land and water in an area covering almost a quarter of Amorgos, the island's mayor, Eleftherios Karaiskos, told ERT.

They are using a drone to search the northern part of the island and are also trying to find Mr. Calibet's phone, he said. Calls to Mr Calibet – who the mayor said had already been to the island – went unanswered.

The mayor said the hike Mr Calibet embarked on was busy and not very difficult, suggesting he might have opted for a more difficult route.

Mr. Calibet began a four-hour hike around 7 a.m. local time (12 a.m. EDT) in the village of Aegiali on Tuesday, according to local media.

The search for the missing man comes just days after authorities spent days scouring another Greek island, Symi, in search of Dr Mosley, a famous British TV doctor who disappeared after going for a walk from a beach.

His body was found in a rocky area and investigators concluded he died of natural causes on the day he disappeared.