Protesters hold a portrait of missing journalist and Riyadh critic Jamal Khashoggi during a demonstration in front of the Saudi Arabian consulate on Tuesday in Istanbul.
A report Monday in the daily newspaper Sabah said investigators were also focused on a convoy of diplomatic vehicles that departed from the consulate on the day Khashoggi vanished. But I will be at some point.
"I know many in Washington, and the world over share this concern for his wellbeing".
He said that everyone in the Turkish media knows that no high-placed sources are available to speak on this issue.
As far as optics go, this case has exposed MBS as ruthless tyrant, who in the recent past, has tried to stifle voices of dissent of several human rights activists, journalists and his tough measures including crackdown on those elements perceived to be anti Saudi regime. "It is [the duty] of the consulate officials", Mr Erdogan said this week. He claimed that Khashoggi had left the building not long after he entered earlier this week.
The source said Turkish officials were trying to identify them.More news: Red Sox 16, Yankees 1: Eovaldis brilliance, Holts cycle power Boston
What's been the reaction to the disappearance?
United Nations experts have demanded a "prompt independent and global investigation" into his disappearance.
Flight records show two Saudi planes arrived at Istanbul's Ataturk airport on Tuesday and departed separately that same day, hours after Khashoggi was last seen.
If that doesn't happen soon, it's clear that Britain and its allies are likely to conclude that Saudi Arabia has crossed an unacceptable line. We look at the media and see various reports that make us think about it.
The obvious difficulty of imposing ambitious reforms on the Kingdom led the administration to cut MBS some slack for heavy-handed tactics, but if Khashoggi was kidnapped or murdered by Saudi officers in Turkey (with his corpse dismembered to dispose of the evidence, according to the most lurid rumors in Turkish circles) it could become a major diplomatic crisis for the White House.
The 59-year-old Khashoggi went missing while on a visit to the consulate in Istanbul for paperwork to marry his Turkish fiancee.
Reuters' Turkish sources did not say how they thought Khashoggi was killed.More news: Bellingcat investigators say second Skripal poisoning suspect identified
Turkish President Recep Tayyip Erdogan, left, chats with Hungarian President Janos Ader as he steps out on the terrace of the presidential Alexander Palace in Budapest, Hungary, Oct. 8, 2018. She eventually called the police.
According to The Washington Post, where Khashoggi was a contributor, he visited the Saudi consulate in Istanbul last week to get a document for his upcoming wedding. "We believe that the murder was premeditated and the body was subsequently moved out of the consulate".
Turkish officials told Reuters over the weekend they believed he had been killed inside the consulate.
Reacting to the news of the alleged murder, the journalist's Turkish fiancee, Hatice Cengiz, said on Twitter she "did not believe he has been killed".
Graham, who played golf Sunday with Trump at the president's course in Sterling, Va., said that he had consulted with Senate Foreign Relations Committee members Bob Corker (R-Tenn.) and Benjamin L. Cardin (D-Md.) over their "shared concerns regarding the whereabouts and treatment" of Khashoggi.
Saudi Arabia says the allegations are baseless.
Erdogan promised to follow up personally on the case of Khashoggi, whom he referred to as "a journalist and a friend". "They gave me a platform to write freely and I wish I had that platform in my home".More news: Trump says UN ambassador Haley to leave at end of year
The programme has released audio of the conversation, saying that although it would not normally do so, it had decided to make an exception "in light of the circumstances".