"There is currently no firm date for the return of international staff to Pyongyang, but discussions are continuing on timing and modalities," said a spokesperson for the office of Joe Colombano, the U.N. resident coordinator for North Korea.
But analysts suggest Washington may be open to resuming talks with North Korea, with Moscow potentially playing the role of mediator.
South Korea's humanitarian assistance to North Korea reached zero last year for the first time in nearly 30 years, amid Pyongyang's continued antagonistic stance toward Seoul, the unification ministry said Wednesday.