Seoul ( CNN ) -- North Korea proclaimed itself a `` nuclear state '' this week following a revision of its constitution earlier this year . Kim Jong-Il has `` transferred the country into an undefeated country with strong political ideology , a nuclear power state , and invincible military power , '' according to the updated constitution posted on its portal website Naenara . The website posted the revised constitution on Wednesday , according to Yonhap , the South Korean state affiliated news agency . North Korea ready to carry out nuclear test at any moment , Seoul says . The statement looks all too familiar . North Korea previously announced its nuclear capability through its state-run broadcaster and newspapers , `` but no expression can be stronger than including it in their constitution , '' Professor Choi Jong Kun of Yonsei University told CNN . `` It is an announcement of confirmation , '' he added , `` and it appears to be directed to the U.S. and other relevant nations . '' The communist state carried out nuclear tests in 2006 and 2009 . Signs of new activity at North Korea 's nuclear test site . Pyongyang recently announced that it will press on with its nuclear program in response to what it calls `` hostility from the United States . '' A defense publication , IHS Janes , also said it detected signs of activities ramping up at North Korea 's nuclear test site , raising speculation Pyongyang may be preparing for a third nuclear test .
North Korea proclaimed itself a `` nuclear state '' in a revised constitution this week . Analyst : Appears to be directed at the U.S. as the rhetoric from Pyongyang rises . Score: 6