One body found on isolated Greek island as authorities continue search for missing American tourists

With temperatures unusually high, Greek authorities fear that foreign tourists are not sufficiently informed of the dangers of exerting themselves physically in such conditions. So far, a total of four foreigners have disappeared, including two American men,

Both American tourists left for the paradise destination and nothing was heard from them until this Sunday, when the authorities found the body of one of them on a beach near the port of the island of Matharaki, but the details remain unclear.

The international media has reported that tourists sometime visit the isolated Greek isles to hike and explore.

The victim was last seen Tuesday at a tavern in Mathraki, west of the island of Corfu, where he was staying with a Greek-American friend, investigators told ABC News.

The friend called police after returning home Thursday, finding the lights on and the air conditioning on, but there was no sign of the American or his identification and travel documents, according to investigators.

The body is expected to be taken to the nearby island of Corfu, where an autopsy will be performed, authorities said.

This Sunday the search continues for Albert Calibet, 59, a retired Los Angeles County police officer, who has been missing since Tuesday after going on a solo hike on Amorgos Island.

Debbie Leshane, Calibet's girlfriend, said he called her just before leaving for a hike. He said they talked for about six minutes and Calibet then sent him a photo around 9:20 a.m. local time Tuesday from the trailhead sign.

The strange disappearances come after the famous British television doctor, Michael Mosley, was found dead in early June on the Greek island of Symi, probably of natural causes, although the cause of death has not been officially reported.