South Korea's President Park says North Korea preparing to conduct nuclear test

South Korea has detected signs that the North is preparing for a fifth nuclear test, President Park Geun-hye said. , Yonhap news agency said she did not elaborate on what the signs were, but ordered the military to be prepared. It comes after reports in local media about increased activity at the North's Punggye-ri nuclear test site, where the previous nuclear tests took



place. 

A new test would be further defiance of tougher sanctions imposed by the UN last month. In January, the North conducted its fourth nuclear test and a rocket launch a month later, raising tensions on the peninsula. Observers have been saying another test could come before North Korea holds its Workers' Party congress in Pyongyang in May.