The North´s Committee for the Peaceful Reunification of the Fatherland is accusing South Korea of pushing the two Koreas to the brink of war.
The committee said in a statement carried Friday by state-run media that it considers all inter-Korean agreements "dead" and says it will not honor their disputed western sea border.
Tensions have been high since South Korean President Lee Myung-bak took office nearly a year ago pledging to get tough on Pyongyang.
South Korea warns North not to repeat armistice violation