an ISIS-affiliated account on the messaging app Telegram has sent out a message about Anonymous' threat to launch its "biggest operation ever" against the terrorist group.<br />After the Paris terror attacks on Friday that left at least 129 people dead and hundreds more injured, the hacking collective Anonymous posted a video in which a person who claims to represent the group said, "Anonymous from all over the world will hunt you down."<br />"We will launch the biggest operation ever against you," the masked person said.<br />"Expect massive cyberattacks.<br />War is declared.<br />Get prepared."<br />Anonymous started targeting extremists in January after the terror attacks on the satirical French magazine Charlie Hebdo.<br />The hackers worked to identify ISIS-linked social media accounts and take down extremist websites.
