North Korean leader Kim Jong Un ordered the country to improve its nuclear attack capability after watching a recent ballistic missile launch test, the country's state media reports.
North Korea's official Korean Central News Agency (KCNA) quoted Kim saying he wanted "more nuclear explosion tests to estimate the destructive power of the newly produced nuclear warheads and other tests to bolster up the nuclear attack capability."
It says Kim declared that the DPRK would make its enemies "regret their misjudgment" and "reckless action."
On Thursday, North Korea fired two short-range ballistic missiles that traveled about 500 kilometers before falling into the water off the country's east coast.
The missile tests were likely in response to massive military drills by South Korea and the United States, which Pyongyang has called a preparation for invasion.
Following the tests, Pyongyang said it will "liquidate" all remaining South Korean assets on its territory, referring to two abandoned joint projects: the Kaesong industrial complex and the Mount Kumgang tourism resort, both inside North Korean borders.
The North's Committee for the Peaceful Reunification of Korea also said it is nullifying all agreements with South Korea on economic cooperation and exchange programs, and threatened military and economic actions against the South Korean government.