WikiLeaks website comes under cyberattack

"WikiLeaks.org is presently under attack," the group said on Twitter late Tuesday. One hour later, the site and the cables posted there were inaccessible.

WikiLeaks updated its Twitter account to say that it was "still under a cyberattack" and directed followers to search for cables on a mirror site or a separate search system, cablegatesearch.net.

The apparent cyberattack comes after current and former American officials said the recently released cables—and concerns over the protection of sources—are creating a fresh source of diplomatic setbacks and embarrassment for the Obama administration. It was not immediately clear who was behind the attack.

The Associated Press reviewed more than 2,000 of the cables recently released by WikiLeaks. They contained the identities of more than 90 sources who had sought protection and whose names the cable authors had asked to protect.

Officials said the disclosure in the past week of more than 125,000 sensitive documents by WikiLeaks, far more than it had earlier published, further endangered informants and jeopardized U.S. foreign policy goals. The officials would not comment on the authenticity of the leaked documents but said the rate and method of the new releases, including about 50,000 in one day alone, presented new complications.