Saudi officials and consulate workers denied murder allegations and claimed that Khashoggi left the consulate, but failed to provide any evidence of his exit from the facility.
The comments marked a break from the Trump administration's previous refusal to speculate over the fate of Khashoggi and came as the United States president is under growing pressure to take action on the case.
Saudi Telecom are their longest running commercial partner and previous year United entered into a "strategic partnership" with the General Sports Authority of Saudi Arabia which involves United "lending its business and sporting expertise to clubs, sporting authorities and individuals in Saudi Arabia". This created a major diplomatic crisis for the kingdom, with mounting evidence that the Saudis were involved fueling a growing outcry from foreign governments, US lawmakers and the Trump administration.
Speaking to reporters after a phone call with King Salman, Mr Trump said the Saudi leader had firmly denied knowing what had happened to Mr Khashoggi.
Trump announced he'd despatched Secretary of State Mike Pompeo to the kingdom, to try and find out what happened to Khashoggi, a Saudi national who had been living and working in the US.
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This image taken from CCTV video obtained by the Turkish newspaper Hurriyet claims to show Saudi journalist Jamal Khashoggi entering the Saudi consulate in Istanbul, October 2, 2018.
"Per two sources who spoke to CNN, however, the Saudis are preparing a report admitting that they meant to abduct and bring Khashoggi back to Saudi Arabia, but that he was inadvertently killed in the process".
Two leading Republican senators said Congress stands ready to act, including a possible halt of military sales, if President Donald Trump doesn't.
"If we have already lost Jamal, then condemnation is not enough".
The source said it would be a joint search with the Saudi authorities. "Certainly our involvement in Yemen with Saudi Arabia will be affected", said Flake, Republican-Arizona. The lawmakers' letter was a preliminary step under the Global Magnitsky Act toward taking punitive action.
Sen. Bob Corker, Republican-Tennessee, who as chairman of the Senate Foreign Relations Committee has reviewed the U.S. intelligence into what happened to Khashoggi, has said, "The likelihood is he was killed on the day he walked into the consulate". The foreign minister of the neighbouring island kingdom of Bahrain, Khalid bin Ahmed Al Khalifa, tweeted Sunday night that there should be a boycott of the ride-hailing app both there and in Saudi Arabia.