The Justice Department seized hundreds of computers and arrested four people in an international crackdown on Internet pirates illegally distributing copyrighted video games, software and movies, such as the latest episode of ``Star Wars.''

Agents executed 90 search warrants in the United States and 10 other countries as part of Operation Site Down. The raids, which began Wednesday, shut down at least eight major online distributors and seized pirated works worth more than $50 million, authorities said.

At a news conference Thursday, Attorney General Alberto Gonzales credited the busts with ``striking at the top of the copyright piracy supply chain.'' Gonzales said the piracy rings are responsible for providing ``the vast majority of the illegal digital content now available online.''

Online piracy rings are known as ``warez,'' pronounced ``wares.'' They function as underground cyberspace co-ops, in which members swap the latest copyrighted material. Warez groups are notoriously difficult to penetrate. Many are based overseas and users are tech-savvy, communicating in encrypted messages and requiring codes and passwords.

The federal operation targeted ``first-providers,'' or those who provide the copyrighted work to the groups.

Arrested were: William Venya, 34, of Chatsworth; Chirayu Patel, 23, of Fremont; Nate Lovell, 22, of Boulder, Colo.; and David Fish, 24, of Watertown, Conn. Criminal complaints charged each with copyright infringement and conspiracy to commit criminal copyright infringement.

The four have been ordered to appear July 14 before U.S. Magistrate Judge Howard R. Lloyd in San Jose.