The top nuclear envoys of South Korea, the United States and Japan agreed Tuesday to work closely on fully implementing the latest sanctions imposed on Pyongyang by the U.N. Security Council along with unilateral measures taken by the three allies.

The agreement came at talks between Kim Hong-kyun, special representative for Korean Peninsula peace and security affairs at South Korea's Foreign Ministry; Joseph Yun, U.S. special representative for North Korea policy; and Kenji Kanasugi, director general of the Japanese Foreign Ministry's Asian and Oceanian Affairs Bureau.

The three officials are head delegates to the long-stalled six-party talks on ending North Korea's nuclear weapons program.