FREEPORT, Bahamas – Jett Travolta’s body shows no sign of head trauma and his death certificate says he was killed by a seizure, an undertaker said Monday, after doctors performed an autopsy on the 16-year-old son of the U.S actor.

The remains of John Travolta’s son were being cremated and his parents planned to return to the United States with the ashes on Tuesday, said Keith McSweeney, director of the funeral home handling the body.

Jett Travolta had a history of seizures and was found unconscious in a bathroom Friday at a family vacation home on Grand Bahama Island.

Glen Campbell, assistant director of the funeral home, told The Associated Press that the body is in “great condition,” despite police officials who had said the teen hit his head on a bathtub.

Authorities didn’t release the results of an autopsy performed Monday, but Campbell saw the body and the death certificate, which was based on its findings.