Carnival Cruise Line said Tuesday that "all indications" are a passenger died of a medical condition and that it continues to cooperate with authorities.
The passenger died Feb. 27 on a trip on the Carnival Sunshine to Nassau, Bahamas, the FBI said in a statement Sunday.
It said it was investigating the suspicious death of a female passenger who was unresponsive and was subsequently declared dead on the ship.
FBI spokesperson Kevin Wheeler said Tuesday that the agency's initial statement remains and that it had no other comment.
Carnival said in a statement Tuesday: "While we continue to cooperate with authorities, all indications pertaining to the death of a guest on board Carnival Sunshine suggest that it was a natural death due to a medical condition.
"We will defer to the FBI on any specific details which may possibly be released at a later date as we fully respect the investigative process, but our initial emergency medical response was appropriate and it appears that this was indeed a medical situation that sadly resulted in the death of a guest."
The Sunshine, which carries up to 3,002 passengers and 1,040 crew members, returned to Charleston, South Carolina, on Saturday, the cruise line said.
The FBI said Sunday that investigators processed the woman’s room.
Carnival has said Bahamian officials would conduct an autopsy. The woman's body was taken off the ship at Nassau, and her husband also got off, it said.