South Sudan's health officials are testing samples from five people to see if they have contracted the Ebola virus.
The suspected cases were detected in three regional states bordering neighbouring Uganda and the Democratic Republic of Congo.
Uganda is currently dealing with an outbreak of the haemorrhagic fever. Forty-three cases have been confirmed and nine deaths have been recorded.
Mabior Kiir, the head of planning and information at the Public Health Emergency Operation Centre says that one suspected case was detected in Eastern Equatoria state’s Nimule town on the border with Uganda.