U.S. President Joe Biden has told Saudi King Salman he will work for bilateral ties "as strong and transparent as possible," the White House said Thursday, ahead of the expected release of a sensitive U.S. intelligence report on the 2018 murder of Saudi journalist Jamal Khashoggi.

The report is said to be a declassified version of a top-secret assessment that sources say singles out Crown Prince Mohammed bin Salman, the 85-year-old king's son, for approving the murder of Khashoggi in the kingdom's consulate in Istanbul.

Saudi Arabia denies that the 35-year-old crown prince, the de facto ruler of the kingdom, approved the killing.