Megaupload, a popular online download file-hosting site, was shut down on Thursday by the U.S. Government, The Associated Press reported. The Hong-King based site, established in 2005, allows users to upload and download files, and has frequently been accused of assisting in music, video, and other types of piracy.

Federal prosecutors have charged Megaupload's founder, and others, with violating piracy laws. The indictment accused Megaupload of costing copyright holders $500 million in lost revenues from pirated material. Megaupload has denied that accusation, saying they are diligent in responding to DMCA takedown notices, according to the AP.

With 81 million unique visitors, Megaupload is the  72nd most visited website on the internet, according to Alexa.  The founder, Kim Schwartz, known better as Kim Dotcom, also runs Megavideo, which allows users to watch uploaded videos. That site was also taken down.