SEOUL (AFP) - North Korea appears to be preparing for a fourth nuclear test, South Korea said on Monday, following intelligence reports of heightened activity at its main atomic test site. "There are such signs," Unification Minister Ryoo Kihl-Jae told a parliamentary committee hearing when lawmakers asked him to confirm the reports. It was the North's third nuclear test in February and subsequent UN sanctions that kickstarted the cycle of ongoing escalating military tensions that the international community is desperate to break. The JoongAng Ilbo daily said South Korean intelligence had detected unusually busy personnel and vehicle movements at the North's Punggye-ri nuclear test site since last week. "We are trying to figure out whether it is a genuine preparation for a nuclear test or just a ploy to heap more pressure on us and the US," it cited an unnamed South Korean government official as saying. Intelligence reports also suggest Pyongyang has readied
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