Facebook is taking an Israeli cyber surveillance firm to court next week, for allegedly hacking users of its encrypted messaging service WhatsApp.
The social media giant accused the NSO Group of hacking into the phones of nearly 1,400 users in October.
Among them were human rights activists, political dissidents and journalists.
The NSO Group disputes the allegations, promising to fight them vigorously.
Amazon Chief Executive Officer Jeff Bezos has previously said NSO could have provided the software that Saudi Arabia used to hack his phone.
Mazen Masri, an international law professor at City University of London, who has also been advising the plaintiffs in a case against the NSO Group in Israel, talks to Al Jazeera