The killing of a critic like Jamal Khashoggi is something that must "never happen again", Saudi Arabia's Foreign Minister Adel al-Jubeir said Tuesday, as he pledged a "thorough and complete" investigation into the journalist's death.
Saudi Arabia's leadership will "see to it that the investigation is thorough and complete and that the truth is revealed and those responsible will be held to account", he told reporters after meeting with his Indonesian counterpart in Jakarta.
"And that mechanism and procedures are put in place to ensure that something like this can never happen again."
His comments come as Saudi Arabia kicked off an investment summit Tuesday despite growing international outrage over the murder of Khashoggi, which triggered a wave of cancellations from global CEOs and policymakers.
The three-day conference began amid tight security at Riyadh's Ritz-Carlton hotel, with Russian Direct Investment Fund chief Kirill Dmitriyev and French Total CEO Patrick Pouyanne among the confirmed speakers listed by organisers for the opening day.

Journalist Jamal Khashoggi was a critic of the Saudi leadership. Source: AAP
Indonesian Foreign Minister Retno Marsudi said she told al-Jubeir that Jakarta was "deeply concerned" about Khashoggi's killing at the Saudi consulate in Istanbul this month, which Ankara has said was "savagely planned".
'Naked truth' to be revealed
Turkish President Recep Tayyip Erdogan is expected later Tuesday to reveal what he has said is the "naked truth" about the murder.
A tough critic of Saudi Crown Prince Mohammed bin Salman, Khashoggi, 59, disappeared after he entered the Saudi consulate in Istanbul on October 2 to collect a document for his upcoming marriage.

Turkish President Recep Tayyip Erdogan has vowed to reveal more details about the police investigation into Khashoggi's alleged murder. Source: AAP
A few days later, a Turkish government source said police believed he was murdered by a team sent to Istanbul, and on October 17, a Turkish newspaper said he was tortured and decapitated inside the consulate.
After more than two weeks of near silence, Saudi Arabia admitted on Saturday that Khashoggi was killed in an altercation at the consular office -- an explanation rejected by friends and foes alike.
US President Donald Trump, who initially said he found Riyadh's initial explanations credible, told reporters at the White House Monday: "I am not satisfied with what I have heard" since then, and expected to know more "very soon"