JUBA, Jan 27 - South Sudan's government urged opposition forces to halt fighting on Tuesday, saying a rebel advance and ongoing clashes that have already caused mass displacement in Jonglei state threatened to reignite civil war.

The clashes pitting government forces against fighters loyal to the Sudan People’s Liberation Army‑in‑Opposition (SPLA‑IO) are occurring at a scale not seen since 2017, according to the United Nations.