An ongoing police search for a missing American tourist widened on Monday far beyond the Beit She’an area, where the 80-year-old man was last seen.

Herman Kuehn, of Missouri, was last seen at 12 p.m. on Friday at the site of ancient ruins in Beit She’an. His wife and fellow tourists have since lost contact with him, sparking a large-scale police search backed by a helicopter.

“We’ve widened the search to other areas, including Tiberias, Jerusalem, the Dead Sea, and other tourist attraction centers,” Beit She’an police station chief, Dep.- Cmdr. Ran Ofir told The Jerusalem Post Monday.

Ofir said police search teams, which included police on horseback, Border Police and IDF soldiers, have fully covered the immediate area around the archeological site, adding that he now believes Kuehn may have boarded a bus to another destination in the country.

“His health was generally good. He did however have an accident a few years ago which resulted in him being confused at times,” said Reverend Mike Graves, one of two seminary professors leading a group of American seminarians and church members around the country.

Graves explained that contrary to an earlier police report, Kuehn had not suffered a stroke, “although his symptoms would resemble that. Bottom line, he may not approach people for help.”

Kuehn’s wife, Mary, and the other tour group members “are holding up as best they can. She of course appreciates everyone’s love and prayers,” Graves added.

Graves asked readers of this story to post it on Facebook, adding that he hoped it could help the search efforts.

Kuehn was last seen wearing a white shirt and khaki-colored pants. He has white hair and a hearing aid.

“We are very concerned about his well-being,” said Ofir. “The search continues.”

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