US President Donald Trump says there is "no time limit" for North Korea to denuclearise and that there is no need to rush the process.
It marks a shift in tone from Mr Trump who previously said nuclear disarmament would start "very quickly".
Last month, the US president and North Korean leader Kim Jong-un held historic talks and pledged to denuclearise the Korean peninsula.
The accord did not have a timetable for the process or plan to carry it out.
Since the meeting between Mr Trump and Mr Kim on 12 June, there has been little reported progress towards denuclearisation.
Last week North Korea accused the US of making "gangster-like" demands for the process, and branded the US attitude at high-level talks as "extremely troubling".
Mr Trump said on Tuesday that talks with Pyongyang were going fine.
"We have no time limit. We have no speed limit," the US president told reporters.
"Discussions are ongoing, and they're going very, very well," he said.
"The sanctions are remaining. The hostages are back. There have been no tests. There have been no rockets going up for a period of nine months, and I think the relationships are very good, so we'll see how that goes."
The US president also said North Korea's nuclear threat had been a major topic during his meeting with Russian President Vladimir Putin earlier this week.
"President Putin is going to be involved in the sense that he is with us," Mr Trump said.