Carnival Cruise Line said in a statement that an internal investigation indicated a man who died on the Carnival Dream cruise ship died of natural causes.

GALVESTON, Texas (KHOU) - The Carnival Dream cruise ship, based out of Galveston, Texas, is the site of a death investigation, according to authorities. Law enforcement could not confirm if the investigation is criminal.

An FBI investigation is underway after an incident on a Carnival Dream cruise ship based out of Galveston, Texas, according to multiple reports. KHOU cites law enforcement sources, who claim there is a "death investigation.