CHILD pornography websites will be blocked by three major internet providers in the US.

ISPs Verizo, Sprint and Time Warner Cable agreed to wipe out the vile material from their servers.

The three companies will also pledge $1.1million (£562,000) to remove online child porn created by users through their services.

The changes will affect customers across the United States, said Attorney General Andrew Cuomo.

Time Warner Cable acted as soon as it learned that users were posting objectionable material and eliminated it, said spokesman Alex Dudley.

He said Time Warner didnt host or provide any of the content and was simply a portal, allowing groups to be created with content provided by the users.

"As soon as we were made aware of the issue ... we took steps to correct," said Mr Dudley.

The agreements follow an undercover investigation of child porn newsgroups.