South Korean and US officials are monitoring activities at a possible nuclear site in North Korea to determine if the communist country is planning a second test, news reports said.
Seoul is keeping a close watch on the movement of trucks and soldiers at the Punggye-ri site in North Korea's remote northeast, South Korea's Yonhap news agency reported Saturday, citing several unidentified military officials.
One official, however, said a second test was "not believed to be imminent."
South Korea has also detected a new building being erected at the site and were trying to conform if it was linked to another nuclear test, the JoongAng Ilbo newspaper reported, citing unidentified officials.
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