PARIS, Oct 27 (Reuters) - Authorities in Monaco said late on Monday that they had detained a man and had opened an investigation into the death of a member of the princely family.
• The body of Antoine de Massy, 29, was found on Sunday evening in a park. Authorities are still determining the cause of death, Monaco's prosecutor's office said
• "All hypotheses are on the table, including that of a simple accident," the prosecutor's office said in a statement
• De Massy was the grandson of Princess Antoinette, the older sister of Prince Rainier III, who was the father of Prince Albert
(Reporting by Makini Brice; Editing by Xevi Fontdegloria)