Authorities in Warrap state (center) declared that the livestock rustling was the reason that triggered violence. Around 70 persons were hospitalized with different kinds of injuries.
United Nations spokesmen noted that those frequent armed clashes make the humanitarian situation much worse.
The country is the youngest in the world since it got its independence from Northern Sudan just a decade ago.
However, the separation from North Sudan, with an ethnically Muslim Arab-majority, has by no means brought peace as a conflict soon broke out between President Salva Kiir and Vice president Riek Machar, which degenerated into a conflagration.
Kiir, of the Dinka ethnic group, accused Machar, who belongs to the Nuer group, of organizing a palace coup to assassinate him and seize power.
After years of bloody clashes both reached an agreement for the division of power and the organization of a government with personalities of other South Sudanese nationalities.