China's press watchdog has exposed 19 domestic websites responsible for distributing obscene flash and cell phone games as part of the country's latest efforts to clean up the Internet.

Among them, 17 websites, including lywww.com and flash.shangdu.com, were found to have provided online pornographic flash games, according to a statement released Thursday by the General Administration of Press and Publication (GAPP).

The other two sites, www.ibox360.net and www.sisdown.com, were listed due to their download service, offering mobile phone games with lewd content.

The GAPP warned these websites to delete all pornographic content, and those failing to do so would be shut down.

As part of a nationwide campaign to sweep out pornography from Chinese media and publications, the GAPP periodically publicizes lists of websites which are found to contain pornographic content.