South Korea\'s central bank said Friday that it plans to beef up its monitoring of the financial markets as the U.N. Security Council\'s adoption of new sanctions on the North for its nuke test may raise geopolitical risks. The U.N. Security Council unanimously adopted a resolution Thursday to impose tougher sanctions on North Korea in response to its nuclear test last month. The resolution calls for tightening financial restrictions and cargo inspection on the North, and curbing its development of nuclear weapons and missiles.