The director of national intelligence, John D. Negroponte, had resisted setting up the Web site, which some intelligence officials felt implicitly raised questions about the competence and judgment of government analysts. But President Bush approved the site’s creation after Congressional Republicans proposed legislation to force the documents’ release.

In his statement last night, Mr. Negroponte’s spokesman, Chad Kolton, said, “While strict criteria had already been established to govern posted documents, the material currently on the Web site, as well as the procedures used to post new documents, will be carefully reviewed before the site becomes available again.”

A spokesman for the National Security Council, Gordon D. Johndroe, said, “We’re confident the D.N.I. is taking the appropriate steps to maintain the balance between public information and national security.”

The Web site, “Operation Iraqi Freedom Document Portal,” was a constantly expanding portrait of prewar Iraq. Its many thousands of documents included everything from a collection of religious and nationalistic poetry to instructions for the repair of parachutes to handwritten notes from Mr. Hussein’s intelligence service. It became a popular quarry for a legion of bloggers, translators and amateur historians.

Among the dozens of documents in English were Iraqi reports written in the 1990s and in 2002 for United Nations inspectors in charge of making sure Iraq had abandoned its unconventional arms programs after the Persian Gulf war. Experts say that at the time, Mr. Hussein’s scientists were on the verge of building an atom bomb, as little as a year away.

European diplomats said this week that some of those nuclear documents on the Web site were identical to the ones presented to the United Nations Security Council in late 2002, as America got ready to invade Iraq. But unlike those on the Web site, the papers given to the Security Council had been extensively edited, to remove sensitive information on unconventional arms.

The deletions, the diplomats said, had been done in consultation with the United States and other nuclear-weapons nations. Mohamed ElBaradei, the director of the International Atomic Energy Agency, which ran the nuclear part of the inspections, told the Security Council in late 2002 that the deletions were “consistent with the principle that proliferation-sensitive information should not be released.”