Facebook is seeking to have NSO barred from accessing or attempting to access WhatsApp and Facebook's services and is seeking unspecified damages.

The security flaw was patched, but questions remain about who was targeted and why.

NSO Group is fighting three lawsuits that allege its spyware was used to monitor journalists, activists and a friend of Jamal Khashoggi in Canada.

Undercover operatives have targeted at least six people who have raised questions about spyware from NSO Group, an Israeli software firm.

The Toronto-based researchers who reported that Israeli software was used to spy on WJamal Khashoggi's inner circle are being targeted in turn by international undercover operatives.