The website promoting Saudi Arabia's upcoming investment conference was apparently hacked on Monday, briefly showing a doctored image of the kingdom's crown prince wielding a bloody sword over murdered journalist Jamal Khashoggi.

Dozens of business leaders, prominent speakers and media companies — including CNBC — pulled out of the second annual Future Investment Initiative in Riyadh following allegations that Saudi agents killed Khashoggi in a Saudi consulate in Istanbul, Turkey.

The Saudi government on Friday acknowledged the Saudi operatives were behind Khashoggi's death, after initially claiming the journalist left the consulate alive. Saudi Arabia took 18 people into custody, including the 15 agents identified by Turkish authorities.

The kingdom has sought to distance Crown Prince Mohammed bin Salman from the slaying. Several of the accused killers have been linked to the king-in-waiting.

The image on the Future Investment Initiative website, captured by several news agencies before the website went down, depicts Prince Mohammed wearing a robe labeled ISIS and standing next to a gun-wielding figure who resembles a fighter aligned with the terrorist group. Khashoggi is depicted kneeling in front of the crown prince.