SEOUL, May 18 (Xinhua) -- South Korea's top policymaker on the Democratic People's Republic of Korea (DPRK) affairs on Wednesday expressed worry about Pyongyang's possible nuclear test.
Unification Minister Hong Yong-Pyo said at a special lecture in Seoul that the DPRK conducted its fourth nuclear test on Jan. 6 and now is a crucial juncture of possibly staging the fifth nuclear detonation.
Hong said it is a high time to sternly tackle possible DPRK provocations and build a sustainable peace on the Korean peninsula.
The DPRK was widely expected here to carry out another nuclear test before or after the historic Workers' Party of Korea (WPK) congress that lasted for four days through May 9.
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