<div><span style="font-size: 10pt;">North Korea on Sunday condemned the latest round of sanctions imposed by the United States, accusing it of trying to undermine an improvement in inter-Korean relations during the Winter Olympics.&nbsp;&nbsp;</span></div>''<div><br />''</div>''<div>The North's KCNA news agency, citing North Korea's foreign ministry, said the two Koreas have cooperated together and the Olympics was held successfully.&nbsp;</div>''<div><br />''</div>''<div>It said the U.S., however, brought the threat of war to the Korean peninsula with large-scale new sanctions on the North ahead of the Olympics closing ceremony.&nbsp;</div>''<div><br />''</div>''<div>The agency said a blockade by the United States would be considered an act of war.</div>