An investigator for Amazon chief Jeff Bezos says that Saudi Arabia hacked Bezos’s phone and accessed his data.
The investigator named Gavin de Becker was hired by Bezos to find out how his private messages had been leaked to the National Enquirer tabloid.
Mr de Becker linked the hack to the Washington Post’s coverage of the murder of Saudi writer Jamal Khashoggi at the Saudi consulate in Istanbul.
Saudi Arabia has not yet commented on the allegation.
The Amazon chief owns the Washington Post.
Mr de Becker said he had handed his findings over to US federal officials.
“Our investigators and several experts concluded with high confidence that the Saudis had access to Bezos’ phone, and gained private information,” he wrote on the Daily Beast website.
Mr de Becker’s findings come after Mr Bezos in February accused the National Enquirer’s parent company American Media Inc (AMI) of blackmail, saying it had threatened to publish his intimate photos unless he said that the tabloid’s reporting was not politically motivated.
He alleged that the Saudi government had targeted the Washington Post – for which Mr Khashoggi had been writing.
“Some Americans will be surprised to learn that the Saudi government has been very intent on harming Jeff Bezos since last October, when the Post began its relentless coverage of Khashoggi’s murder,” he said.
“It’s clear that MBS considers the Washington Post to be a major enemy,” he added, referring to Saudi Crown Prince Mohammed bin Salman.