"But we're waiting for the results of about - there are three different investigations, and we should be able to get to the bottom fairly soon".
Mr Trump has previously vowed to inflict "severe punishment" on Saudi Arabia if it was behind Mr Khashoggi's killing - but also said he is against cancelling military contracts with Riyadh. "I mean it's bad, bad stuff, but we'll see what happens".
President Donald Trump waves off further questions as he heads to board Air Force One after talking to reporters about journalist Jamal Khashoggi's disappearance while departing for travel to Montana from Joint Base Andrews, Md., Oct. 18, 2018.
It comes amid allegations the country was behind the killing of Saudi journalist Jamal Khashoggi.
'We'll be making a statement, a very strong statement'.
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The investigators left the residence around 1:30 am, but some of them headed to the nearby consulate to conduct a search, which was continuing into the early hours of Thursday.
If Riyadh finds a scapegoat and absolves senior members of the royal family over the disappearance of The Washington Post columnist in the Saudi consulate in Istanbul two weeks ago, Trump may accept it.
On Wednesday, German Foreign Minister Heiko Maas said he was postponing a planned trip to Saudi Arabia pending the outcome of the investigation into Khashoggi's disappearance, calling the case "extremely worrying. and disturbing".
The president also said consequences would have to be "very severe" if it turns out Saudi Arabia is responsible for Khashoggi's death. Whether any of the pushback and outrage will lead to any rethinking of the U.Sadministration's's approach to Saudi Arabia, however, remains to be seen.
Later in the day, Trump told reporters that "it certainly looks like" Khashoggi was dead. Increasingly upset USA lawmakers are condemning the Saudis and questioning the seriousness with which Trump and his top aides are taking the matter, while Trump has emphasized the billions of dollars in weapons the Saudis purchase from the United States.
The statement said that the family had been in "close contact with the Saudi government at the highest level" and that they were assured that 'many steps that are being taken at the very top to answer numerous questions we, and the world have, regarding Jamal's disappearance'.