Story highlights South Korea: North Korea "walking the path of self-destruction"

State media: North Korean leader Kim Jong Un has ordered tests of a nuclear warhead

Testing will occur in a "short time," KCNA reports

(CNN) North Korean leader Kim Jong Un has ordered tests of a nuclear warhead in the "nearest future," state-run news agency KCNA said Tuesday.

According to KCNA, the proposed tests are the result of years of development and "diligent research" into heat-resistant materials and technology.

Kim Jong Un guided an "environmental simulation for re-entry by the warhead tip," the report said.

Kim Jong Un has reportedly ordered ballistic rockets tests to "enhance the reliance of nuclear attack capability."

South Korean President, Park Geun-Hye, warned North Korea should be ready to accept the consequences if it did not curb its nuclear ambitions.

"North Korea will walk the path of self-destruction if it does not change," Park said at a cabinet meeting.