Bin Salman, who has been struggling over the past weeks to get rid of a scandal over the gruesome murder of dissident Saudi journalist Jamal Khashoggi, arrived in Algeria late Sunday for a two-day visit after a stop in Mauritania.
The Saudi heir met Prime Minister Ahmed Ouyahia, who had also received him at the airport.
Before the summit, Prince Mohammed had visited the United Arab Emirates, Bahrain, Egypt and Tunisia.
Trump has brushed aside assessments by USA intelligence and other experts that the crown prince must have been involved in the high-level operation, and said he would maintain close relations with Saudi Arabia in part because of its oil wealth and its multi-billion-dollar purchases of US arms. "I think we're going to see definitely some return to institutionalism, some return to a consensus-based decision-making process and commitment to defined procedures". "We believe bringing to light all aspects of the murder and prosecution of all perpetrators will be in the interest of Saudi Arabia", he said.
It said Prince Mohammed was "responsible for the death of a large number of children and civilians in Yemen" as well as that of Khashoggi.
Khashoggi's killing has put mounting pressure on Riyadh and MbS, who Turkish officials - and reportedly the Central Intelligence Agency - have concluded ordered the critic's death. The group even petitioned the country's government, requesting that Mauritanian authorities sever ties with Saudi Arabia as long as Riyadh remains engaged in the war in Yemen.
But Secretary of State Mike Pompeo met with his Saudi counterpart in Buenos Aires and again defended the U.S. embrace of the crown prince.
The crown prince enjoyed a buoyant welcome at the G-20 on Friday from Putin, the two exchanging a high-five and grinning broadly as if they were long-lost friends. He called the prince a "beast 'pac man, '" because "the more victims he eats, the more he wants".
Khashoggi is said to have used the WhatsApp thread to engage in stern criticism of Bin Salman. When he informed Khashoggi of this, the journalist replied, "God help us".