WASHINGTON, Oct 29 (AFP) - The United States said on Friday its policy towards North Korea had not changed after a senior U.S. official responsible for nuclear policy raised some eyebrows by saying Washington would be willing to engage in arms-control talks with Pyongyang.

Some experts argue that recognizing North Korea as a nuclear-armed state, something Pyongyang seeks, is a prerequisite for such talks. But Washington has long argued that the North Korean nuclear program is illegal and subject to United Nations sanctions.

Bonnie Jenkins, State Department under secretary for arms control, was asked at a Washington nuclear conference on Thursday at which point North Korea should be treated as an arms-control problem.

"If they would have a conversation with us ... arms control can always be an option if you have two willing countries willing to sit down at the table and talk," she replied.

"And not just arms control, but risk reduction - everything that leads up to a traditional arms-control treaty and all the different aspects of arms control that we can have with them. We’ve made it very clear to the DPRK ... that we’re ready to talk to them - we have no pre-conditions," she said, referring to North Korea by the initials of its official name.

Referring to North Korean leader Kim Jong Un, she added: "If he picked up the phone and said, 'I want to talk about arms control,' we're not going to say no. I think, if anything, we would want to explore what that means."

The United States and its allies are concerned that North Korea may be about to resume nuclear bomb testing for the first time since 2017, something that would be highly unwelcome to the Biden administration ahead of mid-term elections early next month. North Korea has rejected U.S. calls to return to talks.

Asked about Jenkins' comment, State Department spokesperson Ned Price said: "I want to be very clear about this. There has been no change to U.S. policy."

Price said U.S. policy remained "the complete denuclearization of the Korean Peninsula," while adding, "we continue to be open to diplomacy with the DPRK, we continue to reach out to the DPRK, we're committed to pursuing a diplomatic approach. We're prepared to meet without preconditions and we call on the DPRK to engage in serious and sustained diplomacy."