CNNMoney reports that following today's shut down Megaupload by federal prosecutors, "hacktivist" collective Anonymous has apparently attacked the websites for the Department of Justice, Universal Music Group, the Recording Industry Association of America, and the Motion Picture Association of America. A Department of Justice representative commented to CNN, "We are having website problems, but we're not sure what it's from".

The Twitter account AnonOps seems to have confirmed that Anonymous is behind the website takedowns.