Machar fled South Sudan after new fighting erupted in the capital, Juba, in July 2016, ending a brief attempt at peace in which he returned to his role as Kiir's deputy.
South Sudan rebel leader Riek Machar meets President Salva Kirr for peace talks ahead of African Union summit
South Sudan president Salva Kiir and opposition leader Riek Machar continued meeting into the night and were expected to continue discussions tomorrow in neighbouring Ethiopia, which invited them for talks as pressure grows to end a conflict that has killed tens of thousands of people and created Africa's largest refugee crisis since the 1994 Rwanda genocide.
South Sudan's residents have little hope that its warring leaders, President Salva Kiir and his former deputy Riek Machar will heal the animosity that split it just two years after it became the world's youngest nation
Kiir said he pledged his "100 percent commitment" to ensuring Machar's security while in Juba.
More than a third of South Sudan's population are expected to face severe food shortages over the coming months
There is no precise official toll of how many died, either in the recent fighting in Juba or in the wider war that began in December 2013.
Kiir called for Machar to meet him for talks to save the peace deal but acknowledged the deep mistrust that led to days of intense fighting.
South Sudan's vice president has withdrawn with his troops to outside of Juba but is not planning for war, his spokesman said on Wednesday, as a ceasefire that ended heavy fighting with the president's forces entered its third day.
At least 36,000 people have fled their homes in Juba since heavy fighting erupted in the South Sudanese capital on Friday, said the United Nations.
UN Secretary-General Ban Ki-moon urged the Security Council on Monday to impose an arms embargo on South Sudan, sanction leaders and commanders who are blocking the implementation of a peace deal and fortify a UN peacekeeping mission.
Eight people have been killed and 67 injured at the UN's so-called "Protection of Civilian" sites in Juba since Sunday.
Five years after gaining independence from Sudan, South Sudan is entangled and paralysed from an escalating violence. 115 soldiers were reportedly killed after gun battles broke out across South Sudan’s capital Juba on its fifth independence anniversary.
Friday's violence in South Sudan is yet another blow to a shaky peace deal that has so far failed to end the civil war that broke out in December 2013.
The gunfire began outside the presidential compound and soon spread through the city of Juba.
The violence echoed the skirmish between soldiers in Juba in 2013 that sparked the country's civil war in which tens of thousands of people were killed.
South Sudanese President Salva Kiir and rebel commander Riek Machar signed a ceasefire deal on Friday.
South Sudan said on Tuesday it had arrested 10 senior political figures and was hunting for its ex-vice president, accusing him of leading a "foiled coup" in the oil-producing nation's capital, where gunfire rang out for a second day.