An influential group of South Sudanese politicians added their voices to rising concerns, warning that the country was "on the edge of a precipice".
The United Nations Mission in South Sudan has always operated under a “protection of civilians” mandate but its performance has been disappointing.
Renewed fighting in South Sudan that has killed more than 300 people is set to dominate the African Union summit.
Still reeling from a bloody conflict, the country’s international reserves can only cover a few days of imports
Allies of Machar secure the petroleum and interior cabinet posts, while members of Kiir’s party will get the defence and finance portfolios
In South Sudan Kiir and Machar kick off ‘new’ rule with 240% inflation, empty coffers, and a mountain of problems
“Remilitarising Juba - having the armed forces of the two contending parties in the city - is insane”
Rebel no more: Machar sworn in as South Sudan vice-president after return to capital, Kiir apologises for war
"I am very happy to welcome and warmly receive my brother Dr. Riek Machar," said archrival President Kiir
Machar is to be sworn in to his former position as vice president, with the parliament and cabinet expanding to incorporate his rebel allies
Some of the rebels were visibly nervous, but others were more cheerful and raised fists into the air as their leader shouted "Viva SPLA, viva SPLM!"
UPDATE: U.S pulls funding for Machar return, as all hold their breath to see if he'll make Monday show
However, there was a “further lack of action” to arrange flights for Monday, the British Embassy in Juba said in a statement on its Facebook page
South Sudan rebel chief to miss international deadline for big return; expected to fly in next week as peace deal hangs in balance.
UPDATE: Diplomats say 'unbelievable' S. Sudan peace deal hangs on dispute over just two dozen weapons
The latest stumbling block to Riek Machar's big return concerned the number of machine guns and rocket-propelled grenades his men are allowed to carry
Machar still stays away as South Sudan power deal hit by row over troops, arms. US slams rebel leader
The rebel movement is also supposed to contribute 1,500 police to a joint force for the capital
UPDATED: S. Sudan rebel chief Machar postpones return until further notice, wanted to come with 'heavy weaponry'
There are almost 1,400 rebels already in the capital as part of a security arrangement for Machar
Conflict broke out in December 2013 when President Salva Kiir accused Riek Machar of planning a coup
The risks are great, stakes high, soldiers on edge, as S. Sudan readies for rebel chief Machar's return to Juba
The country is close to collapse. "Unless the violent kleptocratic system...is addressed...no government will be able to end the war and atrocities"
Machar has said he’ll travel to the city on April 18 to assume the role of vice president in a transitional government led by rival President Kiir
First, they became independent from Khartoum. Now over 55,000 South Sudanese flee to Sudan in three months
South Sudan became independent from Sudan in 2011, but two years later it descended into a brutal civil war that has killed tens of thousands
President Salva Kiir and Machar in August signed a peace deal that committed them to a transitional administration.