SoftBank Group Corp Chief Executive Masayoshi Son, whose $93 billion Vision Fund drew nearly half its money from Saudi Arabia, canceled a speaking engagement at the kingdom's investment conference this week, a person close to the matter told Reuters.

It was unclear whether Son would still attend the event which started on Tuesday, the person said on condition of anonymity.

The cancellation comes as pressure mounts on Riyadh over the disappearance and death of journalist Jamal Khashoggi, with many high-profile company executives pulling out altogether.