A group of 50 U.S. and Japanese pornography producers have filed a lawsuit against South Korean Internet users for illegally uploading their content on the Internet for commercial purposes.

South Korean police said the 50 foreign firms have selected a local law firm to seek damages from about 10,000 heavy uploaders in South Korea.

"We selected about 10,000 user IDs that earned financial benefits from habitually uploading pornography on the Web sites," an official at the law firm was quoted as saying by Yonhap News Agency.

"We also plan to take legal action against some 80 file-sharing Web sites for aiding and abetting the distribution of such contents."