A senior Saudi Arabian prince cast doubt upon the reported CIA finding that Saudi Crown Prince Mohammed bin Salman ordered the killing of journalist Jamal Khashoggi in Istanbul last month, saying the agency could not be counted on to reach a credible conclusion.

"The CIA is not necessarily the highest standard of veracity or accuracy in assessing situations. The examples of that are multitude," Prince Turki al-Faisal, a senior member of the royal family, told journalists in Abu Dhabi on Saturday.

The prince, a former Saudi intelligence chief who has also served as ambassador to the United States, said the agency's conclusion that Iraq possessed chemical weapons before the U.S. invasion in 2003 showed it could be unreliable.