The most recent tit-for-tat exchange started with Pyongyang is displeasure at Seoul is support for the latest round of sanctions imposed by the UN Security Council after North Korea went ahead with its February 12 nuclear test.The country has officially rejected the sanctions,which were unanimously decided at the UNSC,and are aimed at freezing accounts,stopping bulk financial transactions,the transportation of banned cargo and tougher screenings of the country is diplomats when travelling. Pyongyang claims that targeting it with sanctions will have opposite effect to curbing its nuclear program,multiplaying its strike capability by "This will be the fifth time sanctions are implemented since 2006.