KINGSTON, Jamaica –  Police in Jamaica say they are looking for three U.S. citizens who vanished after they disembarked from a cruise ship.

Police late Thursday identified them as 45-year-old Donald Henderson, 43-year-old Maria Henderson and 21-year-old Aja Henderson. It is unclear how they are related to each other. Police did not immediately return calls seeking further comment.

Police said in a statement that the three disembarked from a Carnival Freedom cruise ship that arrived in the popular tourist town of Ocho Rios on Wednesday.

Carnival officials did not immediately respond to requests for comment.