American man, 72, believed to have gone overboard after he disappears from Princess Cruise ship

A 72-year-old American man traveling on a Princess Cruise ship mysteriously vanished from the boat, prompting officials to believe he fell overboard at some point during the five-day voyage around Mexico.

Authorities launched a search for the passenger after the Ruby Princess docked in San Francisco just before 7 a.m. Monday and crews realized the passenger was nowhere to be found onboard, the cruise line said.

The man, who hasn’t been identified publicly, was traveling alone and is feared dead.

“Princess worked throughout the day with local authorities. CCTV footage has also been extensively reviewed and the ship was searched thoroughly several times without success,” a spokesperson for the cruise line told The Post.

“Having ruled out other possibilities, this is being treated as a man overboard incident.”

“We extend our heartfelt condolences to the family and friends of the guest who was traveling alone,” the spokesperson added.

The Ruby Princess set off for Ensenada in Mexico on Nov. 27.

It wasn’t immediately clear when the passenger went overboard.