North Korea is threatening to retaliate for what it calls US double standards over recent rocket launches by Pyongyang and US ally Seoul.
A North Korean Foreign Ministry spokesman did not elaborate on what that might entail in his comments Saturday (local time) to the official Korean Central News Agency.
But Pyongyang has recently threatened to conduct its third nuclear test in response to what it calls US hostility.
Washington says Seoul's rocket launch Wednesday had no military intent while Pyongyang's in December was a test of banned ballistic missile technology.
The UN Security Council has imposed new sanctions on Pyongyang for its launch. Pyongyang says it should be allowed to launch satellites for peaceful purposes.
Both Koreas say their satellites are working properly. US experts say Pyongyang's satellite is apparently malfunctioning.