A convoy carrying the journalists and local officials was ambushed in Raja county, western Bahr al Ghazal State yesterday, leaving a total of 11 dead, state governor Rizik Zakaria Hassan was quoted as saying.
The journalists worked for South Sudan TV, Raja Radio and Radio Wau.
The area where the attack took place borders Sudan's troubled Darfur region as well as the Central African Republic. Several armed groups are known to operate in the area, although the report said no group has yet claimed responsibility for the attack.
The fighting has been concentrated in the south, centre and oil-rich north of the country.