Saudi Arabian group OurMine hacked Facebook and Instagram accounts for Facebook and Messenger. Group claims its intent is to demonstrate that every system or individual could be hacked. Mark Zuckerberg, Twitter co-founder Evan Williams, David Guetta Daniel Ek, former Twitter CEO Dick Costolo, Twitter CEO Jack Dorsey, the CEO and founder of Spotify, Google CEO Sundar Pichai, and many others have been hacked. Group also hacked social media accounts of HBO and Game of Thrones and several high-profile Twitter accounts.”]
Source: https://securityaffairs.co/wordpress/97480/hacking/facebook-twitter-instagram-accounts-hack.html