U.N. experts have demanded an immediate investigation by the U.S. and other authorities into allegations that Saudi Arabia's crown prince was involved in a plot to hack the phone of Amazon boss and Washington Post owner Jeff Bezos.

The U.N. special rapporteurs, Agnes Callamard and David Kaye, said on Wednesday they had information pointing to the "possible involvement" of Crown Prince Mohammed bin Salman in the alleged 2018 cyberattack, which preceded alleged threats by the National Enquirer to publish intimate photographs of the billionaire tech tycoon.

Callamard, the special rapporteur for extrajudicial killings, and Kaye, special rapporteur for free expression, said in a statement that they believed the hack was carried out "in an effort to influence, if not silence, The Washington Post's reporting on Saudi Arabia" and called for an "immediate investigation by U.S. and other relevant authorities."