The prince told world leaders that "unless the crime is proven, you can not blame Saudi Arabia", Erdogan quoted him as saying.
The killing of Khashoggi, a Washington Post columnist and a vocal critic of Saudi leadership, has set off a firestorm of demands from U.S. lawmakers for a strong response to the kingdom as the White House has been reluctant to assign blame to the crown prince.
In related news, President Vladimir Putin said on Saturday that Russian Federation and Saudi Arabia had agreed to renew a pact on oil production cuts, amid slumping crude prices on global markets.
"I spoke directly to the crown prince to highlight our concerns and our need for better answers on the killing of Khashoggi", Trudeau said.
"There's no direct evidence linking him to the murder of Jamal Khashoggi", Pompeo told CNN.
Turkish President Recep Tayyip Erdogan demanded Saturday that Saudi Arabia extradite suspects in the killing in Istanbul of journalist Jamal Khashoggi, taking to task the kingdom's crown prince who was basking in his quick return to the world stage at the G20.
Erdogan said the Saudis have refused to help Turkish prosecutors with information on the whereabouts of Khashoggi's body and the identities of accomplices said to have supported the visiting Saudi hit squad. "It remains an important relationship, and we're aiming to keep that relationship with the Kingdom of Saudi Arabia".
Also on the agenda were economic matters, Trudeau said, although he didn't elaborate.
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The statement came after Pompeo and Defense Secretary Jim Mattis told the Senate that weakening of ties between the United States and Saudi Arabia over the killing would adversely affect the national security of America.
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.
Jamal Khashoggi went missing after entering the Saudi Consulate in Istanbul on October 2.
Demonstrators from the Stop The War Coalition stage the protest against the killing of journalist Jamal Khashoggi, war in Yemen and United Kingdom arms sales to Saudi Arabia outside the Saudi Arabian Embassy in London, Britain, October 25 2018.
The US Treasury Department has sanctioned 17 individuals it said were involved in Khashoggi's death, including Qahtani, Mutreb and the Saudi consul general in Turkey, Mohammad al-Otaibi.
President Donald Trump, who also has been briefed on the CIA's findings, has been equivocal in assigning blame to the crown prince, who works closely with the president's son-in-law and senior adviser Jared Kushner on Middle East issues.
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.