The White House said the US was open to talks with North Korea but added that the country must live up to its UN obligations.
The US has "opened lines of communication" with North Korea but will judge the country by its actions and not its words, the White House added.
North Korea had earlier proposed high level talks with the US, just days after cancelling a meeting with South Korea officials.
More top news
A 101-year-old retired teacher has started a new hobby, giving inspirational talks to struggling young jobseekers.
Cloud cover will keep temperatures overnight a little warmer than usual for this time of year. Expect some mist and fog by morning.
A man has been jailed for more than a year after he tried to blame his dog sitting on the pedals for his speeding at close to 100mph.