Jett Travolta, 16, suffered a seizure at the family's holiday home. Loretta Mackey, a police spokesman in Nassau, said that during the seizure the teenager had hit his head while in a bathtub.

He was discovered unconscious and taken to hospital but was declared dead on arrival.

The teenager had a history of seizures. Police said they are planning an autopsy to determine the cause of death.

After an autopsy the body will be buried in Ocala, Florida, close to where the family lives.

They had been staying in their property at the Old Bahama Bay resort community on Grand Bahama Island.

Jett was the eldest child of the star of Grease, Saturday Night Fever and Pulp Fiction and his wife, the actress Kelly Preston. The couple also have a daughter, Ella Blue, who was born in 2000.

For many years now, there have been rumors about the Travolta's being in denial about their son's Autism, relying on their religion to address the situation. According to Scientology teachings, Jett has been given the status of "degraded" where the church says he can cure himself by working harder on the church's teachings. The Travoltas deny that Jett has Autism, claiming that their son's condition is Kawasaki syndrome, a disease characterized by high fever, skin rash and swelling of the lymph nodes.