In a phone call to Saudi Arabia's foreign minister, Adel al-Jubeir, Jeremy Hunt warned that "friendships depend on shared values". "This is a horrific escalation in the crown prince's campaign to silence dissent, to silence any criticism, even the mildest of criticism, from Saudis at home or overseas", says columnist for The Intercept Mehdi Hasan, who is also host of "UpFront" at Al Jazeera English, where he interviewed Khashoggi earlier this year.
'He entered the general consulate himself, and if he has entered by himself and if he did not exit it, of course this should be proven by the general consulate, ' said Erdogan at a press conference in Budapest.
The Washington Post columnist entered the Saudi consulate in Istanbul to get documents for his forthcoming marriage while his Turkish fiancee waited outside for him.
In November, dozens of princes, businessmen and senior officials were detained in what the authorities said was an anti-corruption crackdown. "I love working with him", MBS said about his relationship with Trump and their joint battle against the Islamic State and other Islamist militants who endorse terrorism.
"Right now, nobody knows anything about it".
Saudi Ambassador to the United States Prince Khalid bin Salman, the Saudi Crown Prince's brother, echoed these comments in a statement, adding that his country has sent a security team, with Turkey's approval, to assist in the investigation.
"I no longer feel like I am really alive", Hatice Cengiz, Khashoggi's fiancé, told the Washington Post.
Earlier reports said Turkish police were focusing on 15 Saudi citizens who came to Turkey on two airplanes on the day of the incident.
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. She eventually called the police.
Turkish officials told Reuters over the weekend that they believed Khashoggi had been killed inside the Saudi consulate in Istanbul, and President Tayyip Erdogan said he was personally following the case. "We believe that the murder was premeditated and the body was subsequently moved out of the consulate".
Turkish authorities have told MEE they believe Khashoggi, a prominent journalist and critic of the Saudi govenrment, was killed soon after entering the building.
Trump, who has long criticized the USA media, on Monday said he was concerned about reports regarding the journalist and did not "like hearing about it", but that he hoped the situation "will sort itself out".
The alleged murder, cloaked in deep mystery, assumes more global significance because Khashoggi was a high-profile journalist with penetrating worldwide connections.
Saudi Arabia says the allegations are baseless. A former Muslim Brotherhood member who befriended Osama bin Laden but later condemned his violence, Khashoggi became a leading proponent for Arab reform-some of the same reforms, in fact, that MBS has spearheaded as part of his Vision 2030 campaign for the kingdom.
"I have left my home, my family and my job, and I am raising my voice", he wrote in September 2017.
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".