Police on Sunday were conducting a three-day intensive search for missing American tourist Herman Kuehn, 80, who disappeared on Friday in Bet She'an.

Dozens of police from the Bet She'an police station, backed by a helicopter, officers on horseback, Border Police, and 30 IDF soldiers scoured the area of Bet She'an over the weekend and Shavuot holiday, searching for Kuehn.

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On Friday at noon, Kuehn arrived with a group of tourists to an ancient ruins site in the area. Since then, he has vanished without a trace.

Police at first suspected that he may have gotten on the wrong tourist bus.

Kuehn speaks no Hebrew. He was last seen wearing a white shirt and Khaki colored pants. He has white hair, and a hearing aid.

The search is being headed by Bet She'an police station chief, Dep.-Cmdr. Ran Ofir, who set up a mobile command and control center to coordinate search efforts.

"He is not in good health as he suffered a stroke," a police spokesman said.