An American tourist, Ann Evans, has been reported missing after she didn’t return to her Holland America cruise ship on November 20 in Marigot, Saint Martin.

The Sint Maarten Police Force (KPSM) is actively searching for 55-year-old Evans, who was a passenger on the cruise.

Officials state that Evans did not reboard the Rotterdam cruise ship at Port St. Maarten after stepping off a tour bus in Marigot during a scheduled island excursion.

“Ms. Evans left the bus in Marigot, located in French Saint Martin,” the police reported, “but she did not make it back to the bus or the cruise ship.”

Authorities from both sides of Saint Martin are continuing their investigation into Evans’ mysterious disappearance. (Robin Utrecht/SOPA Images/LightRocket via Getty Images)

Law enforcement on both the French and Dutch sides of the island has been alerted to Evans’ disappearance.

KPSM believes that a female matching the description of Evans used her passport to check into a hotel on the French side of the island. She has also been seen in the area around the hotel, according to a local news outlet.

Authorities say Ana Evans left a cruise ship in Marigot on Nov. 20 and never came back to the vessel. (Government of Sint Maarten)

A similar case occurred in September when a 47-year-old American woman left a cruise ship while docked in Bonaire and never returned. She remains missing.

Not all missing-person cases are resolved, and some end without a definitive explanation.

KPSM is asking the public for help as the search for Ana Evans remains underway. (LUIS ACOSTA/AFP via Getty Images)

It is unconfirmed whether Evans is in any danger or wants to be left alone. Evans’ current status is unknown.

KPSM is asking for the public’s help in locating Evans.