John Travolta's son has died after apparently suffering a seizure in the bath at the family's home in the Bahamas.

The actor and wife Kelly Preston are said to be "grief-stricken" after 16-year-old Jett was found unconscious in a bathroom by a caretaker at 11.40am yesterday.

He was rushed to hospital but was pronounced dead on arrival.

A police spokesperson said: “Information is that Jett suffered from seizures.

“He was last seen when he went to use the bathroom at their residence.”

The house at the Old Bahama Bay resort, Grand Bahama, where Jett died (Splash)

John has previously denied reports that his only son - he has an eight-year-old daughter, Ella Bleu - was autistic, claiming instead that Jett suffered from Kawasaki Disease, an extremely rare condition that affects the skin, mouth, and lymph nodes.

A post-mortem will be held to determine the cause of death.