"If the United States still dreams of achieving all its sanctions goals, we can either let them continue to dream or crush those dreams," said Ri, according to KCNA's North Korean news agency.

- We are ready for both conversation and confrontation. If the United States tries to oppose us with sanctions and does not abandon its confrontational attitude, it would be a misjudgment on their part.

No concrete talks between the countries have begun after the summit between Donald Trump and Kim Jong-Un Hanoi in Vietnam in February, despite Trump's brief visit to North Korea at the end of June and the US president then saying that the North Korea talks would start a new bullet.

Stephen Biegun, United States special envoy for North Korea, arrived in South Korea's capital Seoul on Tuesday to discuss the forms of new talks.