New York state’s attorney general Andrew Cuomo announced that AT&T Inc. and AOL have agreed to join Verizon Communications, Inc., Sprint, and Time Warner Cable in purging their Internet servers of websites that traffic child pornography.

Both companies have also agreed to shut down access to child pornography newsgroups and online bulletin boards. The agreement will cover nationwide and not just in New York.

“These agreements with two of the nation’s largest ISPs to eradicate child porn web sites from their servers tighten the noose around this despicable trade,” Cuomo said.