WhatsApp has confirmed to NDTV that it contacted several Indian users this week to inform them that they had been targeted by Israeli spyware earlier this year. Indian journalists and activists are believed to have been targets of surveillance for a two-week period until May this year. On Tuesday, WhatsApp's parent company Facebook sued Israeli cybersecurity company NSO alleging that it used WhatsApp servers to spread malware to 1,400 WhatsApp users -- journalists, diplomats, human rights activists and senior government officials across 20 countries. Those targeted were informed before the lawsuit.