Top nuclear envoys of South Korea and the United States agreed on the need for "swift" and "tough" measures against North Korea, promising to closely cooperate in making Pyongyang give up its pursuit of weapons of mass destruction, Seoul's foreign ministry said. 
Kim Hong-kyun, special representative for Korean Peninsula Peace and Security Affairs at the foreign ministry, held talks with his U.S. counterpart Sung Kim via phone and exchanged views on necessary steps in response to the North's nuclear test earlier in the day, according to the ministry. 
"The two shared the view that it is necessary to take swift and strong action through the Security Council, while agreeing to closely cooperate in (seeking) stronger sanctions including additional measures at the bilateral level," Yonhap News Agency quoted on Saturday the ministry as saying. 
They also agreed to have a more "in-depth" discussion on the North's latest nuclear test and its ramifications when they meet in Seoul on Tuesday next week, it added. 

Source : QNA