Adam Shand Kydd

Adam Shand Kydd, stepbrother of Diana, Princess of Wales, 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. Mr. Shand Kydd ' s body was found on a bed at his rented home April 26, the officer said.

The Foreign Office said it had no details about the circumstances of the death.

A spokesman at the Althorp estate of Diana ' s brother Charles Spencer, the 9th Earl Spencer, confirmed Mr. Shand Kydd was the princess ' s brother, but said the family had no comment at this stage.

No personal details about Adam 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.

Frances and Peter Shand Kydd were married in May 1969, a month after her divorce. They separated in June 1988 and later divorced.