North Korea is showing signs it could be preparing to carry out a new nuclear test, South Korea's Unification Minister Ryoo Kihl-jae said Monday, according to the semi-official South Korean news agency Yonhap. Seoul "is on military readiness posture," South Korea's Blue House spokeswoman Kim Haeng said in a briefing. She said national security chief Kim Jang-soo based the assessment on North Korea's hint to foreign diplomats in Pyongyang to send personnel out of the country. The Blue House is the office and residence of South Korea's president, similar to the White House in the United States. "As of now, nothing out of the ordinary has been detected," she said on Kim's behalf. "If limited war is to break out, North Korea should bear in mind that it will receive damages many times over."