Anonymous, a network of unnamed online activists who hack as a form of protest and "cyber warfare," has taken aim at the Ku Klux Klan.
The group claims to have hacked KKK websites and social media accounts and has also published the names of individuals it says are Klan members.
In a video and online posts, Anonymous said the attack is retaliation for KKK threats to use "lethal force" against protestors in Ferguson, Mo.
"Anonymous won't tolerate racism in any form, or the suppression of the right to protest," the group wrote in a blog post on the website anonhq.com.
The group appears to have taken over KKK's Twitter account, @KuKluxKlanUSA, tweeting Sunday, "You should've expected us. #OpKKK continues to be a success. Freedom will prevail."
The next day the group tweeted an image of a unicorn from the same Twitter handle.
Anonymous announced the cyber attack with a YouTube video, where they said they are monitoring KKK servers.
"Anything you upload will be taken down. Anything you use to promote the KKK will be shutdown," an altered voice says in the video.