In an open letter to Tunisia's presidency, the journalists' union slammed "the visit of the Saudi crown prince, which constitutes a danger for the safety and the peace of the region and the world, and a real threat to freedom of expression".
King, a member of the Senate Intelligence Committee, said in an appearance on CBS' "Face the Nation" that "you don't have to be the CIA to put things together and say how could this happen without the prince being involved".
"We need to understand where the investigations are leading us".
"Argentine prosecutorial authorities should scrutinize Mohammed bin Salman's role in possible war crimes committed by the Saudi-led coalition since 2015 in Yemen", said Kenneth Roth, executive director of Human Rights Watch.
The three-day forum was organized by the King Abdullah International Medical Research Center at King Abdul Aziz University for Health Science, with the participation of experts and health practitioners from Saudi Arabia and overseas.
And Corker said he was looking at making "some enhancements" to a request for the Trump administration to investigate whether bin Salman committed human rights violations and should be slapped with sanctions under the federal Magnitsky Act.
Intelligence officials have said the CIA presented the President with a confidence-based assessment given the facts of the situation.
On Sunday, Senator Mike Lee (R-UT) appeared on NBC's "Meet the Press" with Chuck Todd.
GOP senator calls on Gina Haspel to join senators' briefing on Saudi controversy
Schiff says Trump is telegraphing to despots he will have "their back" if they praise or do business with him.
"The crown prince's attendance at the G20 Summit in Buenos Aires could make the Argentine courts an avenue of redress for victims of abuses unable to seek justice in Yemen or Saudi Arabia".
Ernst also said she'd "tend to be with my colleagues" in demanding congressional action against the Saudis.
Trump shocked USA lawmakers and world leaders when he vowed to maintain a partnership with Saudi Arabia, despite mounting evidence that MBS ordered the assassination of Khashoggi, a Washington Post columnist who had criticized the crown prince.
Numerous U.S. lawmakers have said they intend to push for U.S. sanctions against Saudi Arabia because of Khashoggi's killing.
Crown Prince Muhammad Bin Salman, deputy premier and minister of defense, arrived in Egypt on Monday evening in the third leg of his tour of the Arab countries after visits to Bahrain and the United Arab Emirates.
"The CIA points it both ways, and as I said, maybe he did, maybe he didn't, but I will say very strongly that it is a very important ally", Mr. Trump told reporters.
I'm also certain that in the next Congress, people will look into that.More news: Why You Should Not Eat Romaine Lettuce