Meanwhile new diplomatic cables continued to trickle out, including one saying Iran’s supreme leader has cancer and will be dead “within months” and another saying that China would eventually accept a reunited Korea.

In a lengthy statement, the secretary of state had attempted to limit the damage as she told reporters the United States “deeply regrets” the release of the 250,000 diplomatic cables, all apparently from the State Department.

“This disclosure is not just an attack on America’s foreign policy interests. It is an attack on the international community,” Clinton said, following talks in Washington with Turkey’s foreign minister.

“We are taking aggressive steps to hold responsible those who stole this information” and to prevent future disclosures, she added.

The flood of leaked US diplomatic cables – most of which date from between 2007 and February 2010 – has revealed secret details and indiscreet asides on some of the world’s most tense international issues.

WikiLeaks gave the cables to journalists from five Western publications several weeks ago, and they are being released on the Internet in stages.

On Monday the British Telegraph newspaper published an August 2009 cable quoting a businessman with close ties to Iranian elites as saying that Ayatollah Ali Khamenei has a rare form of leukemia and would soon be dead.

Another cable from last year said China, long North Korea’s protector, found Pyongyang’s nuclear weapons “very troublesome” and would accept reunification after the eventual collapse of Kim Jong-Il’s regime.

Earlier highlights included a call by Saudi King Abdullah for the United States to “cut off the head” of the Iranian snake over its nuclear program and leaked memos about a Chinese government bid to hack into Google.

WikiLeaks creator Julian Assange described the mass of documentation as a “diplomatic history of the United States” covering “every major issue.”

Meanwhile, in an interview with Forbes magazine, Assange said WikiLeaks next big document dump will target “a big US bank” early next year.

White House spokesman Robert Gibbs fired back on Monday, calling WikiLeaks and others who leak documents “criminals, first and foremost.”

He added, however, that he did not believe the release “impacts our ability to conduct a foreign policy that moves our interests forward.”

But former US president George W. Bush said the leaks sabotage trust between national leaders.