SEOUL, South Korea (AP) - South Korea's point man on North Korea says there is an "indication" that Pyongyang is preparing for a fourth nuclear test.
Unification Minister Ryoo Kihl-jae told a parliamentary committee Monday that "there is such an indication," according to two ministry officials who spoke on condition of anonymity because they were not authorized to speak publicly on the matter.
Ryoo was answering a lawmaker's question about increased personnel and vehicle activities at the North's nuclear test site.
Ministry officials cite Ryoo as telling the lawmakers he wouldn't provide further details because they involve confidential intelligence affairs.
South Korean defense officials previously said the North completed preparations for a nuclear test at two underground tunnels. The North used one tunnel for its Feb. 12 nuclear test. The second remains unused.