BBC’s Mark Lowen: “It’s extremely rare for journalist to get into areas controlled by the rebels”
South Sudan’s government and rebels have signed a ceasefire agreement after talks in Ethiopia.
Under the deal, signed in a hotel in the Ethiopian capital Addis Ababa, the fighting is due to come to an end within 24 hours.
In the past week, government forces have recaptured the two main cities under rebel control.
More than 500,000 people have been forced from their homes during the month-long conflict.
What started out as a political dispute between President Salva Kiir and his former deputy Riek Machar on 15 December escalated into full-scale conflict, with reports of ethnic killings.
A ceremony to mark the signing of the agreement on the “cessation of hostilities and the question of the detainees” took place at the hotel where the talks were hosted.
The agreement is thought to address the issue of 11 detainees whom the rebels wanted freed, and whose fate had previously left the talks deadlocked.
The detainees – allies of Mr Machar and prominent political figures from a faction of the governing SPLM party – were taken into custody when Mr Kiir first made the allegations of an attempted coup – which Mr Machar denies.
Another key rebel demand was for Ugandan troops fighting alongside the government forces to be withdrawn.
Last week, the UN human rights chief said both government soldiers and rebels had committed atrocities in South Sudan, one of the world’s poorest countries.
More than 70,000 civilians are seeking shelter at UN bases across South Sudan and the UN estimates that considerably more than 1,000 have been killed.
Following the outbreak of hostilities, it was agreed to boost the UN force and an extra 5,500 peacekeepers are being deployed to South Sudan, to bring its strength up to 12,500.
Fighting erupted in the South Sudan capital, Juba, in mid-December. It followed a political power struggle between President Salva Kiir and his ex-deputy Riek Machar. The squabble has taken on an ethnic dimension as politicians’ political bases are often ethnic.
Sudan’s arid north is mainly home to Arabic-speaking Muslims. But in South Sudan there is no dominant culture. The Dinkas and the Nuers are the largest of more than 200 ethnic groups, each with its own languages and traditional beliefs, alongside Christianity and Islam.
Both Sudan and the South are reliant on oil revenue, which accounts for 98% of South Sudan’s budget. They have fiercely disagreed over how to divide the oil wealth of the former united state – at one time production was shutdown for more than a year. Some 75% of the oil lies in the South but all the pipelines run north.
The two Sudans are very different geographically. The great divide is visible even from space, as this Nasa satellite image shows. The northern states are a blanket of desert, broken only by the fertile Nile corridor. South Sudan is covered by green swathes of grassland, swamps and tropical forest.
After gaining independence in 2011, South Sudan is the world’s newest country – and one of its poorest. Figures from 2010 show some 69% of households now have access to clean water – up from 48% in 2006. However, just 2% of households have water on the premises.
Just 29% of children attend primary school in South Sudan – however this is also an improvement on the 16% recorded in 2006. About 32% of primary-age boys attend, while just 25% of girls do. Overall, 64% of children who begin primary school reach the last grade.
Almost 28% of children under the age of five in South Sudan are moderately or severely underweight – this compares with the 33% recorded in 2006. Unity state has the highest proportion of children suffering malnourishment (46%), while Central Equatoria has the lowest (17%).