The issue is one of several that have blocked the resumption of disarmament talks. The Republic of Korea (RoK) also wants an apology for the DPRK's "aggression".

Separately, a RoK’s envoy is on his way to Russia to pursue talks.

The new flurry of diplomacy comes just over a month after talks between the DPRK and the RoK broke up in acrimony.

The DPRK's state news agency, KCNA, reported comments from the DPRK's Foreign Ministry after a four-day visit by Mr Borodavkin.

"The DPRK is willing to come to the six-party talks unconditionally," the DPRK's Foreign Ministry said.

KCNA quoted a ministry spokesman as saying that the DPRK did "not object to the issue of uranium enrichment programme being discussed at the talks".

Mr Borodavkin held meetings with the DPRK’s Foreign Minister Pak Ui-Chun and other DPRK’s officials, the RoK's Yonhap news agency reported.