Fighting flared late on Saturday in south-west of the capital of South Sudan between forces loyal to the President and those backing the opposition.
This is coming after clashes last month raised fears of a slide back into civil war.
Steven Lodu Onseimo, the Information Minister for Yei region where Saturday’s clashes took place, told Reuters that two civilians and a soldier were killed, but said the area was calm on Sunday.
Witnesses had reported heavy gunfire around Yei, which lies on a road linking the capital Juba with neighboring Uganda. The government and opposition each blamed the other side.