The hacker collective known as “Anonymous” declared war on ISIS in a video posted on YouTube in response to the horrendous attacks that took place in Paris on Friday.

According to NBC News, the video has yet to be verified by officials, but in the video a spokesman wears the group’s signature Guy Fawkes mask and says in French that the group will use their expertise in a “war” against the Islamic terrorist 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.

The spokesman continued to call the members of ISIS “vermin,” and that their actions would not go “unpunished.”

As of Monday at 8:30 a.m. Central Time, the video had accumulated 1.1 million views on YouTube, according to the Jerusalem Post.

The Huffington Post reports that the hacktivist group also posted on Twitter: “Make no mistake: Anonymous is at war with Daesh.” Daesh is another name for ISIS.

Anonymous is a group of international network of activist computer hackers who have claimed responsibility for numerous cyberattacks against corporate, religious, and government websites over the past 12 years. Since the Charlie Hebdo attack in January that led to the death of 17 people, Anonymous has been targeting and shutting down Twitter profiles believed to be used by ISIS and their supporters. The Jerusalem Post reports that the hacktivist group has reported more than 39,000 ISIS accounts to Twitter. Out of those, more than 25,000 have been suspended, but almost 14,000 are still active.