South Sudan's former Vice President and rebel leader Riek Machar has sought refuge in a neighbouring country, opposition officials said in a statement on Thursday.
South Sudan has been experiencing a fight between soldiers loyal to president Salva Kiir and sacked Vice President Riek Machar.
Machar had sustained a leg injury from weeks of walking in the bush but it was not serious enough to require medical attention, Dak said.
The fighting erupted less than a year after a peace deal was signed to form a unity government and end the civil war. Find us on Facebook too!
The U.N. mission in South Sudan had "no involvement" in Machar's departure, he added.
Machar, who resumed his role as vice president under the 2015 peace deal, withdrew from Juba with his soldiers last month and left South Sudan on Wednesday to escape government forces, his party said.
There has been sporadic fighting in parts of the country since Machar and his forces fled, especially in the south.
South Sudan, the youngest country in the world is witnessing horrific abuses of its youngest citizens.
Conflict broke out in Africa's newest country in December 2013 with the ruling party and army fracturing after Kiir accused rivals including Machar of plotting a coup against him.
After clashes with President Salva Kiir's army in the capital, Juba, in early July, Machar and fighters supporting him left the city, putting the country's peace deal in limbo.
The capital Juba was hit with violence in July, where over 140 rival militias died and experts fear that the world's newest nation will fall back into civil war unless both sides look to work on strengthening a peace deal from August 2015.
The warning from Unicef comes after the government rejected the UN Security Council's proposal of deploying 4,000 additional troops for peacekeeping efforts in conflict-hit Juba.
South Sudan's new Vice President Taban Deng Gai will begin a two-day visit to Khartoum on Sunday for talks on thorny issues still outstanding from its 2011 secession, an official said.
Most Southern Sudanese refugees live in seven camps in White Nile, East Darfur, West Kordofan and Khartoum States.
Marta Ruedas, the UN Resident and Humanitarian Coordinator in Sudan, announced the number at a press conference here on the occasion of World Humanitarian Day.
Machar disappeared from Juba following the July fighting.
Mr. Kiir, whose forces now fully control the capital, has sought to consolidate his power, replacing Mr. Machar with Taban Deng Gai and calling for early elections, despite pleas from the worldwide community.