Authorities are investigating the disappearance of a Florida woman from a cruise ship sailing along the coast of Italy, relatives say.

Family members identified the woman as Elizabeth Kay Galeana, 22, of Naples, Fla., reporting missing Tuesday from Royal Caribbean's Voyager of the Seas.

Royal Caribbean confirmed only that the missing woman was from the United States and would not identify her, spokesman Michael Sheehan said.

The ship was en route to Naples, Italy, from the port of Civitavecchia, near Rome, according to Royal Caribbean.

Italian authorities conducted air and sea searches but had called off their efforts.

Galeana is the daughter of Frank Galeana, owner of the Galeana Automotive Group dealership in Florida, South Carolina and Michigan.

"We know that she is missing, but that's really all we know," John Scanlan, a sales manager at Galeana Chrysler and Jeep in Fort Myers, told The Associated Press.