North Korea has demanded the removal of UN sanctions imposed for its nuclear and missile tests in order to open up any dialogue with the US.
Pyongyang also said Washington must pledge not to engage in "nuclear war practice" with South Korea for it to extend lines of communication.
The North's National Defence Commission's statement, reported by the official KCNA news agency, said:
If the United States and the puppet South have the slightest desire to avoid the sledge-hammer blow of our army and the people ... and truly wish dialogue and negotiations, they must make the resolute decision.
Firstly, the sanctions resolutions by the UN Security Council that were fabricated with unjust reasons must be withdrawn.