UPDATE 5-WhatsApp security breach may have targeted human rights groups

WhatsApp said on Tuesday that a security breach on its messaging app had signs of coming from a government using surveillance technology developed by a private company, and it may have targeted human rights groups. WhatsApp, a unit of Facebook, said it had notified the U.S. Department of Justice to help with an investigation, and it encouraged all WhatsApp users to update to the latest version of the app, where the breach had been fixed.