PYONGYANG -- The Democratic People's Republic of Korea (DPRK) on Friday accused the United States and South Korea of preparing for a nuclear war against it.

The United States and South Korea "are totally revising and supplementing their scenarios for a war against the DPRK," the official Korean Central News Agency said on Friday, quoting a statement released by the Korean National Peace Committee.

The DPRK conducted its first nuclear test on Oct. 9, sparking a harsh reaction from the international community and sanctions from the UN Security Council.

The United States reaffirmed its commitment to provide a nuclear umbrella for South Korea after the test, and has been trying to press South Korea to support the sanctions.

"Such madcap nuclear war moves against the DPRK are an extremely reckless provocation," the statement said, warning that the two countries were driving the situation to the worst phase.

The DPRK said such action proved that the United States "has no intention to solve the nuclear issue on the peninsula."

South Korea on Thursday joined the U.S.-led sanctions against its neighbor by preventing the entry of any DPRK personnel suspected of having links to the country's nuclear and other weapons programs.

The DPRK warned Seoul on Wednesday not to follow the United States in imposing sanctions against it.