(CNN) -- North Korea said it will launch a military strike against propaganda loudspeakers set up by South Korea along their heavily fortified border, state media reported Saturday.

North Korean armed forces "would blow up with sighting shots loudspeakers and all other means for a psychological warfare in case the group of traitors resumes the psychological warfare against (North Korea) in the areas along the front," the Korean Central News Agency reported.

The propaganda loudspeakers are a recent addition to the demilitarized zone that separates the two nations. They were established after the March 26 sinking of a South Korean warship, which the South blames on North Korea.

The reclusive Communist state pulled out of nuclear talks in April 2009 to protest the United Nations' condemnation over its nuclear test and missile launches. The communist nation has accused Washington of violating its sovereignty by singling it out and reporting it to the United Nations Security Council.

North and South Korea have been bitterly divided since the 1950-53 war between them ended without a peace treaty.