North Korea's military has threatened retaliation against "provocative" acts from the South, including the scattering of anti-Pyongyang propaganda leaflets across the border.
A statement released by Pyongyang's official Korean Central News Agency said "the reckless actions of the confrontational elements to slander the headquarters of our revolution and the socialist system have reached an intolerable phase."
Leaflet launches by the South's military ended in 2000 when ties improved but were restarted after the North shelled a border island last November and killed four South Koreans.
The South's Defense Ministry declines to comment on its psychological operations against the North, saying they are confidential.
compiled from agency reports