New Delhi, April 5: Private data of over 5.6 lakh Indian Facebook users was compromised by a private marketing firm that later sold the persol details acquired through a quiz app to Cambridge Alytica, a UK-based company at the centre of a global privacy breach storm. The social media giant informed the Indian government on Thursday about the details of compromised accounts in response to a notice over the user data breach and details of the steps Facebook was taking to ensure safety and prevent misuse of persol data. (IANS)