US President Donald Trump has suggested “rogue killers” could be behind the disappearance of Saudi journalist Jamal Khashoggi in Turkey.
Speaking to reporters after a phone call with King Salman, he said the Saudi leader had firmly denied knowing what had happened to Mr Khashoggi.
Secretary of State Mike Pompeo is flying to Saudi Arabia immediately.
Saudi and Turkish investigators have been seen entering the Saudi consulate where Mr Khashoggi was last seen.
Turkish officials believe Mr Khashoggi was murdered in the consulate by Saudi agents nearly two weeks ago but Riyadh has always strongly denied this.
The issue has strained Saudi Arabia’s ties with its closest Western allies