FBI spokesman Rich Wolf has identified the woman as 64-year-old Katherine Kennedy, of Midlothian, Va. He says Kennedy died of heart disease.
Her husband found her dead Sunday in her cabin on the Enchantment of the Seas cruise ship. FBI agents met the ship when it arrived in Baltimore on Monday to begin investigating the unexplained death.
Wolf says Kennedy also had a laceration on her forehead, but authorities determined that she got the cut when she fell down. They said it had nothing to do with her death.
Royal Caribbean has said the ship concluded its seven-night sailing in Baltimore as scheduled Monday.