Update – 04:09 EST: South Korean official Ryoo Kihl-jae says he misspoke when he said that there was  an “indication” that North Korea is preparing for a nuclear test.

WASHINGTON D.C. – South Korea’s unification minister Ryoo Kihl-jae said today that there are signs that North Korea could be preparing for a fourth nuclear test.

Ryoo’s comments came after a JoongAng Ilbo report that suggested there had been an increase in the movements of vehicles and personnel near the Punggye-ri test complex in North Hamgyong Province.

Prior to North Korea’s last test in February 2013, satellite analysis showed significant vehicle and personnel