Dreaded terror sect, the Islamic State has threatened the founders of Facebook and Twitter over their attempts to lock the sect from social media.
ISIS threatened Facebook founder Mark Zuckerberg and Twitter 's CEO Jack Dorsey in a new chilling video.
In the 25-minute film extremists hackers claim they are fighting back against efforts by the social media giants to wipe their platforms of accounts promoting terrorism.
Pictures of the two founders can be seen being blasted with a hail of bullets in the amateur footage which emerged today.