U.S. intelligence officials say they have shut down a Web site that weapons experts say contained a basic guide on how to build an atomic bomb.

The Web site was taken down late Thursday after The New York Times asked officials about complaints from international weapons experts and arms control officials.

A spokesman for John Negroponte, the director of national intelligence, says the Internet site will be reviewed "to ensure its content is appropriate for public viewing."

The documents on the Web site were collected in Iraq after the 2003 U.S.-led invasion, but related to weapons activities before the 1991 Persian Gulf War.

The New York Times reported Friday that arms control officials say the documents reveal information about building nuclear bombs that go beyond what is available elsewhere over the Internet and other public forums. One European diplomat describes it as a "cookbook."

The newspaper says the Bush administration created the site in March under pressure from Republican Party lawmakers anxious to find evidence of Saddam Hussein's unconventional arms program, including nuclear weapons research, in the years before he was toppled in the 2003 invasion.

Some information for this report provided by AP, AFP and Reuters.