UK & World News
South Sudan: US Sends Special Envoy Booth
Special envoys from the United States and Nigeria are flying to South Sudan as world leaders step up efforts to avert an all-out civil war.
The US envoy for Sudan and South Sudan Donald Booth was expected in the capital Juba on Sunday.
It follows a mission by foreign ministers from east Africa and the Horn and an appeal by UN chief Ban Ki-moon to end the violence that has gripped the country.
The fighting started a week ago when President Salva Kiir accused his former deputy Riek Machar of attempting a coup.
Mr Machar denies this, and has in turn accused Mr Kiir of carrying out a vicious purge of his rivals.
The clashes have left hundreds dead and sent tens of thousands of people fleeing to UN bases for protection or to safer parts of the country.
South Sudan has been blighted by ethnic divisions, corruption and poverty since it won independence in 2011.
Foreign governments, including the US, Britain, Uganda, Kenya and Lebanon, have been organising special evacuation flights to pull out their nationals.
On Saturday, four US servicemen were wounded when their aircraft came under fire as they approached the rebel-held town of Bor on an evacuation mission.
America says its citizens and others from "partner" nations have now been flown safely from Bor to Juba in consultation with the South Sudanese government.
The US aircraft incident underlined the increasingly dangerous situation in South Sudan, where at least one UN base has been attacked in recent days, with two Indian peacekeepers and civilians killed.
President Barack Obama has warned against continued fighting.
"Any effort to seize power through the use of military force will result in the end of longstanding support from the United States and the international community," the White House said.
South Sudan's government has acknowledged that much of Unity State, the country's main oil-producing area, is in the hands of rebels.
Forces loyal to Mr Mahar are also still in control of Bor, the capital of Jonglei state and about 125 miles (200km) north of Juba.
However, South Sudan's army spokesman Philip Aguer said government troops were advancing to retake it.
:: Watch Sky News live on television, on Sky channel 501, Virgin Media channel 602, Freeview channel 82 and Freesat channel 202.