Choe Son Hui, the North's deputy chief official to the stalled six-party talks, said she met Thursday with U.S. representatives at the Northeast Asia Cooperation Dialogue conference, South Korea's Yonhap News Agency reported.
Choe didn't elaborate on the meeting, saying only, "I met."
A diplomatic source at the conference said Choe met with Clifford Hart, the U.S. envoy to the stalled six-party talks, in what was described as a "casual meeting."
The source said the meeting lasted for 30 minutes and was also attended by Han Song Ryol, the North's deputy ambassador to the United Nations.
Six-party talks on North Korea's nuclear ambitions were last conducted in late 2008. Efforts to restart the talk stopped in April.
Han said Friday "outstanding bilateral issues" were discussed but he did not provide any details of the meeting.
The two-day NEACD conference ended Friday.