LONDON -- Adam Shand Kydd, stepbrother of Princess Diana, has died in Cambodia, Britain's Foreign Office and Cambodian police said.
Mr. Shand Kydd, 49, whose father married Diana's mother in 1969, died of a suspected drug overdose, Ngam Ry, a municipal police officer in Phnom Penh, said Tuesday. His body was found on a bed at his rented home late Monday, he said.
"We are in contact with the next of kin and providing assistance," a spokeswoman said on condition of anonymity. "We have no information about whether the death is being treated as suspicious."
At the Althorp estate of Diana's brother Charles Spencer, the 9th Earl Spencer, a spokesman confirmed Mr. Shand Kydd was the princess's brother, but said the family had no comment at this stage.
No personal details about Mr. Shand Kydd and his family were available. He was the author of a 1984 novel, "Happy Trails."
Diana was 6 when her mother left her father, the 8th Earl Spencer, in 1967. Spencer was granted a divorce two years later because of his wife's adultery with Peter Shand Kydd, and she was named the "other woman" in the uncontested divorce of Peter and Janet Shand Kydd. Earl Spencer won custody of Diana and her sisters and brother.