North Korea says it will not resume talks with the South until issues between the two countries are resolved, BBV reports.
Its chief negotiator dismissed the South Korean authorities as incompetent and senseless. Pyongyang is angry at continuing US-South Korea joint military exercises.
Planned talks between President Donald Trump and North Korean leader Kim Jong-un have also been thrown into doubt.
South Korea has offered to act as a bridge between the two sides.
But that now looks less likely following North Korea's statement.