CIA director Gina Haspel briefs Trump over the killing of Jamal Khashoggi

No details of the briefing have been released.

Media reports that have filttered through have said that during the visit Ms Haspel had heard audio recordings that Turkey claims capture the murder.

Meanwhile Saudi Arabia's public prosecutor was quoted as saying Khashoggi's murder was "premeditated".

The US-based Saudi government critic died in the consulate in Istanbul.

Saudi Arabia initially denied all knowledge of the writer's whereabouts when he went missing on 2 October, but later admitted he was murdered at the Saudi consulate in Istanbul, blaming "rogue agents".

The official Saudi Press Agency reported that on Thursday Crown Prince Mohammed bin Salman chaired the first meeting of a committee to reform the state's intelligence services, which was set up following Mr Khashoggi's death.

Last week Saudi Arabia sacked two key advisers to the prince, and arrested 18 people.

Meanwhile, Khashoggi's eldest son Salah arrived in the US on Thursday.

A US spokesman said that Secretary of State Mike Pompeo had told Saudi leaders that he wanted Mr Khashoggi, a dual citizen, to be able to return to the US and was "pleased" that he had been allowed to do so.

Mr Khashoggi, who was filmed on Tuesday shaking hands with the crown prince, had previously been unable to leave Saudi Arabia because of a travel ban imposed following his father's criticism of the kingdom's leadership.