Hacker group Anonymous have apparently responded to the attacks on Paris by posting a video declaration of war against the terrorist group that calls itself "Islamic State."
In the as-yet-unverified video, posted on YouTube, a spokesperson wearing the group's signature Guy Fawkes mask, said the group of hackers would use its expertise to wage "war" on the militant group.
"Expect massive cyber attacks. War is declared. Get prepared," the announcer says in French.
"Anonymous from all over the world will hunt you down. You should know that we will find you and we will not let you go. We will launch the biggest operation ever against you," the spokesperson continued, according to translated transcripts of the video.