North Korea is showing "signs" of preparing a fourth nuclear test, South Korean Unification Minister Ryoo Kihl-Jae has said, with reports of stepped up activity at its main atomic test site.
The daily JoongAng Ilbo on Monday had cited intelligence reports showing a sharp increase in activity at the North's Punggye-ri nuclear test site since last week.
"We are closely monitoring the ongoing situation, which is very similar to the situation seen ahead of the third nuclear test," the newspaper quoted a senior government official as saying.
"There are such signs," the unification minister told a parliamentary committee hearing when lawmakers asked him to confirm the reports, but declined to elaborate.
Read more @: N Korea prepares for 'fourth nuclear test' - Asia-Pacific - Al Jazeera English
Not a lot is being reported other than they are showing signs of actions they have done in the past before nuclear tests.