Multiple federal agencies are investigating a death on board a Texas-based Carnival Dream cruise ship, according to the Federal Bureau of Investigation.

An unidentified person died on the Galveston-based Dream on Wednesday, the FBI Houston office confirmed to the Post.

The incident is being investigated by an FBI Maritime Liaison Agent based out of the Texas City Resident Agency, the US Coast Guard and Customs and Border Protection, authorities said.

Officials haven’t said if the death appeared to be criminal in nature.

“Due to the ongoing nature of the investigation, I am not able to provide additional details at this time,” a spokesperson for the FBI’s Houston office said in a statement.

Passengers aboard the ship, which travels to Costa Maya, Belize, and Cozumel, woke up to sirens around 3 a.m. on the day of the incident, News 4 San Antonio reported.

One man reportedly heard an announcement requesting medical attention on the Serenity Deck, the outlet said.

Carnival Cruise Line has since dismissed that there is any investigation regarding a “suspicious death,” the outlet reported.

“There is no investigation about a suspicious death on Carnival Dream, and it’s disappointing to learn that any guests might be spreading rumors about something they know nothing about,” the company said in a statement to the outlet.

Carnival Cruise Line did not immediately respond to a request from The Post for comment.

GALVESTON, Texas — The Carnival Dream cruise ship, based out of Galveston, is currently the focus of a death investigation. However, law enforcement sources have not confirmed if the incident is criminal in nature.

A spokesperson for the FBI’s Houston office stated, “I can confirm FBI Houston is aware of an incident that occurred around July 23, 2025, on the Carnival Dream cruise ship. An FBI maritime liaison agent, based out of the Texas City resident agency, is coordinating with the U.S. Coast Guard, Customs and Border Protection, and the cruise line regarding this incident.”

Passengers aboard the ship, which travels to Costa Maya, Belize, and Cozumel, reported waking up to the sound of sirens around 3 or 4 a.m. on the day of the incident. One passenger, speaking off-camera, mentioned hearing an announcement requesting medical assistance at the Serenity Deck.

In response to circulating theories about the incident, Carnival Cruise Line issued a statement saying, “There is no investigation about a suspicious death on Carnival Dream and it’s disappointing to learn that any guests might be spreading rumors about something they know nothing about.”

The FBI is the primary federal agency authorized to investigate potential crimes on the high seas. Their ability to investigate depends on several factors, including the ship’s location, points of embarkation and debarkation, and the nationality of the potential suspect or victim. Additionally, other countries may also seek to investigate certain incidents.