North Korea said Thursday that it plans to carry out a new nuclear test and more long-range rocket launches, all of which it said are a part of a new phase of confrontation with the United States.

The North's National Defense Commission said the moves would feed into an "upcoming all-out action" that would target the United States, "the sworn enemy of the Korean people."

Carried by the state media, the comments are the latest defiant flourish from the reclusive North Korean regime, whose young leader, Kim Jong Un, has upheld his father's policy of pursuing a military deterrent and shrugging off international pressure.

U.S. Secretary of Defense Leon Panetta said Thursday there are no "outward indications" that North Korea is about to conduct a nuclear test, but he admitted it would be hard to determine that in advance.

"They have the capability, frankly, to conduct these tests in a way that makes it very difficult to determine whether or not they are doing it," he said in a Pentagon press conference.

"We are very concerned with North Korea's continuing provocative behavior," Panetta said, but he added that the United States is "fully prepared" to deal with any provocations.

North Korea's statement followed a U.N. Security Council resolution submitted by the United States and approved Tuesday that condemned a recent rocket launch by the North and expanded existing sanctions.

Pyongyang's threatening statement "should have been the expected outcome" from the U.N. decision, said Daniel Pinkston, senior analyst for the International Crisis Group covering Northeast Asia.

"I think they are completely outraged and insulted by it," he said.

North Korea's statement prompted France and Great Britain to express exasperation with the secretive regime.

Britain's mission to the United Nations called on North Korean leaders to "refrain from further provocation." France said it "deplores" North Korea's statement, telling its leaders that they need not to threaten, but instead to work toward dismantling their nuclear and missile programs.

In addition to Panetta's statement, the United States added sanctions against more North Korean bank officials and a business linked to the regime's nuclear weapons program.

The Treasury Department announcement targets two Beijing-based representatives of Tanchon Commercial Bank and a company -- Leader (Hong Kong) International Trading Limited -- that the U.S. government says shipped machinery and equipment in support of North Korea's nuclear program.

The organizations are "part of the web of banks, front companies and government agencies that support North Korea's continued proliferation activities," said Under Secretary for Terrorism and Financial Intelligence David S. Cohen.

"By continuing to expose these entities, and the individuals who assist them, we degrade North Korea's ability to use the international financial system for its illicit purposes," he said.

North Korea, which often issues bellicose statements in its state media, said Thursday that it rejects all Security Council resolutions concerning it, describing the most recent resolution as "the most dangerous phase of the hostile policy" toward it.

Analyst: Threat meant as a deterrence

The threats toward the United States, a constant theme in the North's propaganda, have more to do with deterrence than a desire for full conflict, Pinkston said.

"I don't believe they have the capability, the intention or the will to invade or destroy the United States," he said. "They wish to deter interference from the U.S. or any outside powers."

North Korea's successful rocket launch last month nonetheless changed the strategic calculations for the United States, showing that the North's missile program is advancing despite an array of heavy sanctions imposed on it.