The FBI is investigating the death of a 64-year-old woman from Midlothian, Va., who died onboard the Royal Caribbean Enchantment of the Seas. The woman's death has been classified as "suspicious" -- a term used when the cause of death cannot be determined.
The woman's body was found in her cabin by her husband on Sunday.
"Some things that were unusual caused us to become involved," FBI spokesperson Richard Wolf told NBC News.
Wolf said the FBI's evidence response team was sent in to gather evidence. The FBI is waiting for results of an autopsy and toxicology reports.
"We extend our most sincere and heartfelt condolences," Royal Caribbean said in a statement. "A member of our Care Team is providing support and assistance to her family."
The Enchantment was on a seven-day cruise to the Bahamas. It concluded in Baltimore on Monday.