Trump, who has forged closer ties with Saudi Arabia and the 33-year-old Crown Prince Mohammed bin Salman, acknowledged for the first time on Thursday that Khashoggi, a U.S. resident and Washington Post columnist, had likely been killed.
It comes as multiple news outlets reported, citing Turkish investigators, that Khashoggi was dismembered and his remains transported to the official residence of Saudi Arabia's consul in Istanbul, Mohammed al Otaibi.
At the same time tensions are strained between the United States and Saudi Arabia over a journalist who may have been killed, a warning is going out for the U.S.to tread carefully on the world stage.
Emerging details have triggered a number of top government officials to withdraw from participating in the event, including UK Trade Minister Liam Fox. "If they knew about it, that would be bad", he said during an interview on Tuesday. Saudi Arabia has "a healthy spare capacity to serve as a buffer against any emergency", he added.
Khashoggi, who was living in self-imposed exile in the United States where he contributed to the Washington Post, vanished after entering the Saudi consulate in Istanbul on October 2.
Prince Khalid said rumors that the "Kingdom's authorities have detained" Khashoggi or "killed him are absolutely false, and baseless". "Having said that, I would hope that this case can be cleared up as soon as possible".
May seeks to reassure European Union leaders on Brexit deal
Chief EU negotiator Michel Barnier said "much more time" was needed, and that he would continue working "calmly and patiently". The prime minister will be in Brussels until Friday in an attempt to make progress in Brexit negotiations .
Reuters reports that Turkish Foreign Minister Mevlut Cavusoglu has said Pompeo would bring information about Khashoggi's disappearance to Ankara.
Answering a question on what would be the consequences for Saudi Arabia, Trump said: "Well, it'll have to be very severe".
Reports have been circulating for days that the Turkish government has audio recordings of Khashoggi being interrogated and murdered in the Saudi consulate in Istanbul.
Working with the European Union and other partners, the Dutch government would "look at ways global concerns about Khashoggi could be addressed", Foreign Minister Stef Blok said.
When asked about the fate of Crown Prince Mohammed bin Salman and his position at the Royal court, Macron said "it is not for me to comment on internal political situations of any other country, nor the psychological or security aspects in those". A mounting pile of evidence suggests he was killed there.