An independent UN human rights expert investigating the killing of Saudi journalist Jamal Khashoggi is calling for an investigation into the possible involvement of Saudi Arabia’s Crown Prince Mohammed bin Salman, citing “credible evidence”.

Agnes Callamard released a 101-page report into the October killing of Khashoggi at the Saudi consulate in Istanbul that lays out dozens of recommendations.

It calls on UN bodies or Secretary-General Antonio Guterres to “demand” a follow-up criminal investigation.

Callamard noted the “extreme sensitivity” of considering the criminal responsibility of the crown prince, as well as Saud Alqahtani, a senior adviser to the royal court who has not been charged.

“No conclusion is made as to guilt,” she wrote of the two men.

“The only conclusion made is that there is credible evidence meriting further investigation.”

Khashoggi wrote critically of Saudi Crown Prince Mohammed bin Salman in columns for The Washington Post before he was killed.

After denying any knowledge of Khashoggi’s death for weeks, Saudi authorities eventually settled on the explanation that he was killed in an operation masterminded by former advisers to Prince Mohammed.

The kingdom denies the crown prince had any involvement.