People gathered in North Korea
Media playback is unsupported on your device

North Korea vows 'unprecedented' action against South

23 April 2012 Last updated at 19:16 BST

North Korea has warned of "unprecedented" action against South Korea's ruling establishment, amid tough rhetoric between the two sides.

A special operation to begin "soon" would "reduce its target to ashes", the military said in a statement.

The BBC's Lucy Williamson reports from Seoul in South Korea.