Secretary of State Mike Pompeo then had a follow-up call with the crown prince to reiterate the USA request for information and a thorough, transparent investigation.
Former U.S. Energy Secretary Ernest Moniz said on Wednesday he has suspended his role on the board of Saudi Arabia's planned mega city NEOM until more is known about the journalist Jamal Khashoggi, who disappeared on October 2 after visiting a Saudi consulate in Turkey.
Turkish authorities have privately said they believe Khashoggi was killed inside the consulate, a startling allegation that is firmly denied by the Saudis.
Trump encouraged reporters to contact the first lady's office, although a spokeswoman didn't immediately respond to a request for information.
The New York Times has admitted to removing details it had included in a previous article about missing Saudi journalist Jamal Khashoggi, where it claimed that the 15 Saudi tourists were operatives sent to kill him.
"There needs to be a credible investigation to establish the truth about what happened, and - if relevant - to identify those bearing responsibility for the disappearance of Jamal Khashoggi, and ensure that they are held to account", foreign ministers from the three countries said in a joint statement.
With the mystery over Khashoggi unresolved after he failed to reappear after walking into the consulate on October 2, a pro-government Turkish daily said the Saudi national had recorded his own interrogation inside the mission on an Apple Watch.
At 5:32 p.m., cameras show Khashoggi's fiancée, Hatice Cengiz, outside the police barricades of the consulate, speaking into her cellphone.
The Aljazeera correspondent Jamal Elshayyal reports from Istanbul that the investigators have heard testimony from a source who was inside the Saudi consulate at the time of Khashoggi's disappearance. On a flight back from Hungary, Erdogan was cited by media as saying that Turkey could not remain silent over Khashoggi's disappearance, stressing the authorities were investigating the case in all its dimensions. Other footage purportedly shows Saudi aircraft and agents arriving in the Turkish city.
Aside from Saudi Arabia and Turkey, Trump has yet to nominate candidates for ambassadorial posts in 20 nations and 46 ambassadorial nominees are still awaiting Senate confirmation. "Part of that may be that they have an incredibly close relationship with the administration". "I think we have to stand up to them and have to say that the current behaviour is unacceptable". It relies on Saudi support for its Middle East effort to counter Iranian influence and fight extremism. Even under the Obama administration, which had hard relations with Riyadh compared with Trump, there were some $65 billion in completed arms sales.
Several sponsors and media groups have made a decision to pull out of this month's investment conference in Riyadh, dubbed Davos in the Desert, as a result of concerns over Khashoggi's fate. Donald Trump Vows "Severe Punishment" if Saudis Behind Jamal Khashoggi Disappearance.