Search continues for U.S. tourist and two French women missing in Greece

Greek police are still searching for a U.S. citizen who went missing on the Greek island of Amorgos, as well as two French women on the island of Sikinos in the Cyclades, a police spokeswoman told CNN on Monday.

Greek police are still searching for a U.S. citizen who went missing on the Greek island of Amorgos, as well as two French women on the island of Sikinos in the Cyclades, a police spokeswoman told CNN on Monday.

Albert Calibet, a 59-year-old American, has been missing since June 11, Petros Vasilakis, head of the Southern Aegean Police press office, told CNN.

Calibet was vacationing alone on the island of Amorgos, Vasilakis said, adding that it was 40 degrees Celsius (104 degrees Fahrenheit) when he went missing.

After searching the island, police are now concentrating on a specific area, and are examining 15 hiking routes in particular, Vasilakis said.

The two French nationals, aged 64 and 73 years old, went missing during a walk on the island of Sikinos, Vasilakis said. The search for them is in progress, but police do not know exactly where they were walking and what their destination was.

Vasilakis told CNN one of the women sent a message of distress to the guest house where she was staying. The person who received the message raised the alarm.

In recent weeks, there have been several cases of tourists dying or going missing while walking in extreme heat on the Greek islands, including British TV personality and health guru Michael Mosley, whose body was found on June 9.