North Korea fax to North Korea : Will `` strike mercilessly without notice '' Such protests are common during North Korean festivals and anniversaries . Protests in South Korea were held over Kim Jong Un second anniversary of death . North Korea routinely threatens to strike after what it calls `` provocations ''
North Korea fax to North Korea : Will `` strike mercilessly without notice '' Protests in South Korea were held over Kim Jong Un second anniversary of death . North Korea routinely threatens to strike after what it calls `` provocations ''