A spokesman for the General Staff of the Korean People's Army (KPA) said Friday the military will take retaliatory measures against South Korea for slandering the socialist system in the Democratic People's Republic of Korea (DPRK).

South Korean troops in various areas, including Yangju and Inchon city, Kyonggi Province, displayed "slogans and posters slandering the socialist system in the DPRK," the spokesman said in a statement.

Angered by the latest provocation from the South, the KPA spokesman demanded the South Korean authorities punish those who committed the "most hideous crimes" and make a formal apology.

Otherwise, the spokesman said all the three services of the KPA and the Worker-Peasant Red Guards will launch retaliatory military actions.