SHANGHAI, May 4 -- Police have received more than 13,000 reports about Internet smut since China launched a campaign to restrict the spread of online pornography on April 12.

The number of reports about pornographic Websites has increased from about 300 to nearly 700 every day. And 31 percent of reports received by police in this period were about pornographic Websites, according to the Ministry of Public Security.

"The fight against pornographic Websites has won wide support from Chinese people," said an MPS official.

A computer teacher, surnamed Jiang, from east Zhejiang Province said: "I'm disgusted by the pornographic material on the Internet, and deeply worried about the impact on children. We really need to crack down on Internet crimes and pornography and create a clean and healthy cyberspace for youngsters."

China has about 123 million Internet users, most of whom are young people.

Wu Heping, spokesman of the MPS, said recently that preliminary statistics show that nearly 80 percent of juvenile delinquents have been lured into crime by Internet content.

"In a high proportion of cheating, rape or robbery cases involving young people, the Internet is a factor," Wu said.

Chinese police last week said they had arrested a 21-year-old student for running five pornographic Websites with 210,000 registered users. Police have closed 1,450 porn Websites online since the launch of the campaign.