The crown prince, Saudi Arabia's de facto ruler, quickly exited the stage without shaking hands or talking with other leaders.
G20 leaders pose for a family photo during the G20 summit in Buenos Aires, Argentina November 30, 2018.
On Friday, Mrs May delivered a "robust" message to Saudi Crown Prince Mohammed bin Salman that the United Kingdom expected his country to co-operate fully with the Turkish probe and to conduct its own investigation in a "credible and transparent" way.
But he criticised Prince Mohammed, saying that during the summit the Saudi heir apparent gave an "unbelievable explanation" on Khashoggi's killing.
"For me, it is obvious that this is an issue that concerns not just Canada but a number of our North Atlantic Treaty Organisation allies", Trudeau said Saturday.
Saudi Arabia has said the prince had no prior knowledge of the murder of the prominent Saudi journalist.
But Bob Corker, the outgoing Republican chairman of the Senate Foreign Relations Committee, said in an interview published on Friday that the U.S. needed to rein in Prince Mohammed, who was "out of control". "It remains an important relationship, and we're aiming to keep that relationship with the Kingdom of Saudi Arabia".More news: Top Five Media Lies on the Migrant Caravan | Trending
More news: Oil Price Sustains Gain As Brent Crude Rises To $59.36 Per Barrel
More news: Melania Trump defends blood-red Christmas trees in White House
President Tayyip Erdogan said on Saturday that Turkey's insistence on finding the truth behind the recent killing of journalist Jamal Khashoggi was not aimed at damaging the Saudi royal family.
Trudeau stressed that he continues to believe "frank and direct" conversations with leaders matter, adding they are what Canadians expect him to do and what the world has come to expect of Canada. "We certainly need to continue to explore. all aspects of the murder and find anyone who was involved, but that should not in any way dissuade us from basically confronting Iran", which the Trump administration views as its major adversary in the Middle East and one that Saudi Arabia is essential to confronting.
He shows up in another portion of the CIA's assessment: an alleged member of the Saudi hit team that U.S. and Turkish officials said Qahtani oversaw, Maher Mutreb, called Qahtani from inside the consulate to inform him Khashoggi was dead, The Washington Post has previously reported.
Still, MBS sent at least 11 messages to his closest adviser - who oversaw the team that killed Khashoggi - in the hours before and after the journalist's death, according to a classified Central Intelligence Agency assessment seen by the Wall Street Journal. "But his own officials have admitted that this was a planned operation".
Speaking to reporters at the G20 summit in Buenos Aires, Erdogan said that solving the Khashoggi killing would also be in the interest of the Saudi monarchy. Al-Qahtani was sanctioned by the White House last month for his involvement. Trump issued a statement that included defence of the kingdom as a "great ally" and refusal to assign blame to the prince, saying "maybe he did and maybe he didn't" order the killing.
Last week, in a rebuke of Saudi Arabia and the administration's handling of the Khashoggi case, a majority of the Senate voted to advance a measure to end USA military support to Saudi Arabia for its war in Yemen against Iranian-backed militants.