WASHINGTON: Saudi Crown Prince Mohammed bin Salman approved of an operation to capture or kill dissident journalist Jamal Khashoggi who was murdered in 2018, according to a declassified US intelligence assessment released on Friday in a manner choreographed to limit damage to US-Saudi ties.

Khashoggi, a US resident who wrote opinion columns for the Washington Post critical of the crown prince's policies, was killed and dismembered by a team of operatives linked to the crown prince in the kingdom's consulate in Istanbul.

Riyadh has denied any involvement by the crown prince, Saudi Arabia's de facto ruler.

"We assess that Saudi Arabia's Crown Prince Muhammad bin Salman approved an operation in Istanbul, Turkey to capture or kill Saudi journalist Jamal Khashoggi," the US Office of the Director of National Intelligence said in the report posted on its website.

"We base this assessment on the Crown Prince's control of decision making in the Kingdom, the direct involvement of a key adviser and members of Muhammad bin Salman's protective detail in the operation, and the Crown Prince's support for using violent measures to silence dissidents abroad, including Khashoggi," it added.