"President Salva has declared the state of emergency in Unity and Jonglei," reported Xinhua citing the South Sudanese government via Twitter.
President Kiir has declared a state of emergency for Unity & Junglei states #SouthSudan
The rebels force, loyal to South Sudan's former vice-president Riek Machar, are in control of Bantio, the capital of the oil- producing Unity state.
President Kiir has declared a state of emergency for Unity & Junglei states #SouthSudan— Gov of South Sudan (@RepSouthSudan) January 1, 2014
Also, South Sudan's army admitted Wednesday that the rebels had reseized the strategic town of Bor, the capital of Jonglei state, after the government troops withdrew from the town.
To put an end of the violence, the Ethiopian capital Addis Ababa is expected to host Thursday peace talks between delegations of South Sudanese government and the rebels.
The forthcoming talks are to discuss ceasefire to end the clashes which claimed the lives of thousands of people in South Sudan, according to the UN reports.