South Sudan’s president Salva Kiir has declared a state of emergency in part of the country’s north-west.
The statement, broadcast on state television, did not give a reason for the decree.
The state of emergency is expected to last for three months.
The conflict in South Sudan has killed tens of thousands of people and displaced more than two million since 2013.
The last state of emergency was in 2014 in Unity State in the north and Jonglei in the east – as rebels fought government forces.
Tensions continue between both sides as heavy fighting has also escalated in the east of the country.
The United Nations says thousands of civilians have fled the town of Pagak and its surrounding areas, crossing the border into Ethiopia. Aid workers have also been forced to relocate.
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