Was WhatsApp hack exploited by security services spying on Khashoggi?

Could a hack which allegedly breached the global messaging service WhatsApp be linked to the murder of Saudi journalist Jamal Khashoggi?

Last year a Canadian-based dissident, Omar Abdulaziz, claimed his phone was tapped using spyware developed by the Israeli cyber surveillance firm NSO, which meant the Saudi authorities could have had access to hundreds of messages he exchanged with Mr Khashoggi about their opposition to the Saudi government.

NSO has denied any involvement with operating or identifying targets of its technology.