"(Feltman's statement) means time is still left, and we have to create a dialogue strategy before it is too late," Choo said.

"In order to safeguard our firm principle that there must never be another war on the Korean Peninsula, it is of great importance to make various attempts at dialogue (with Pyongyang). ... Peace is an ultimate value, and a priority that we should emphasize more," she added.

Choo then called the next seven days a "super week," noting a set of diplomatic events, such as Moon's forthcoming visit to Beijing for a summit with Chinese leader Xi Jinping and her trip to Russia for talks with top Moscow officials.

"We will embark on a super week this week to craft a solution to the North's nuclear issue," she said. "Amid tensions in Northeast Asia caused by the North's missile launch, diplomacy with China and Russia is more important than before." (Yonhap)