Today, the North Korean government released a statement through the Korean Central News Agency condemning the most recent UN Security Council resolution (S/RES/2087) directed at Pyongyang. The UNSC resolution expands the list of sanctioned entities in response to the most recent North Korean satellite launch, which occurred on Dec. 12, 2012.
Although the resolution did not authorize a new round of sanctions, it demanded that Pyongyang refrain from conducting subsequent launches "using ballistic missile technology." It also instructed the country to comply with previous council resolutions directing it to suspend all activities related to its ballistic missile program and to abandon its nuclear weapons program.
In response to the resolution, Pyongyang stated that it would take "steps for physical counteraction to bolster the military capabilities for self defence, including the nuclear deterrence, both qualitatively and quantitatively." The statement suggests that North Korea might conduct a third nuclear test explosion in the near future to demonstrate technological advances in its nuclear force and to publicly defy the Security Council's directive.
For the official statement, see: http://www.kcna.kp/kcna.user.article.retrieveNewsViewInfoList.kcmsf.
For more information and analysis, see: http://www.nytimes.com/2013/01/24/world/asia/north-korea-hints-at-new-nuclear-test.html