South Sudan is "back to war", a spokesman for the vice-president has told the BBC, as rival factions clash and hundreds have been reported killed.
Forces loyal to Vice-President Riek Machar say government troops attacked their positions in the capital, Juba.
But Information Minister Michael Makuei Lueth said the reports of war were "dishonest".
The UN mission said hundreds had sought shelter in its compounds, and called for leaders to restrain their troops.
UN Secretary-General Ban Ki-moon condemned what he called the "senseless violence". The UN Security Council is holding an emergency session to discuss South Sudan.
'Situation under control'
Col William Gatjiath, Mr Machar's military spokesman, told the BBC President Salva Kiir "isn't serious" about a peace agreement.
Image copyright CCTV Image caption Chinese peacekeepers were deployed as violence broke out on Friday He said "hundreds" of Mr Machar's troops had died on Sunday, and that troops loyal to Mr Machar were advancing on Juba from different directions.
Mr Lueth said government troops responded when Mr Machar's forces attacked a checkpoint, adding that those forces had now been scattered. "The situation is normal and it is under full control," he added.
The clashes follow days of fighting in the world's newest country between supporters of Mr Kiir and Mr Machar.
At least 150 people were killed in fighting on Friday, before calm was restored on Saturday. Local radio station Radio Tamazuj reported on Sunday that the death toll from those clashes may be as high as 271.
South Sudan's men of dishonour
'We want peace - and ice cream'
South Sudan: Obstacles to a lasting peace
Why does S Sudan matter so much to the US?
Jump media player
Media player help
Out of media player. Press enter to return or tab to continue.
Media captionFive years of South Sudan The violence has raised fears of renewed instability, with a 2015 peace deal failing to quell unrest.
Heavy gunfire was reported on Sunday near a military barracks occupied by troops loyal to Mr Machar.
Friday's exchanges were apparently sparked by a shootout between Mr Kiir's and Mr Machar's bodyguards. The two men met at the presidential palace on Friday, and issued a call for calm.
How did we get here?
Image copyright Getty Images Image caption South Sudan's short history has been marked by violence and poverty July 2011 - South Sudan becomes an independent country, after more than 20 years of guerrilla warfare, which claimed the lives of at least 1.5 million people and displaced more than four million.
December 2013 - Civil war breaks out after President Salva Kiir sacks the cabinet and accuses Vice-President Riek Machar of planning a coup. The war is fought broadly between the country's biggest ethnic groups - the Dinka, led by Mr Kiir, and the Nuer, under Mr Machar.
More than 2.2 million people are displaced by the fighting. Famine puts the lives of thousands at risk. Tens of thousands of people are reported killed, and Mr Machar flees the country.
Image caption There is no dominant culture in South Sudan - the Dinka and the Nuer are the largest of more than 60 ethnic groups, each with its own language and traditional beliefs, alongside Christianity and Islam August 2015 - President Kiir signs a peace deal with rebels after a threat of sanctions from the UN.
April 2016 - Mr Machar returns to South Sudan to take up his job as first vice president in a new unity government led by President Kiir.
The move marks "the end of the war and the return of peace and stability to South Sudan", Mr Kiir says.
Huge distrust - Mary Harper, BBC World Service Africa Editor
The situation in South Sudan has echoes of the days before the civil war began, in December 2013, when skirmishes between troops loyal to Mr Kiir and Mr Machar escalated into a national bloodbath, killing tens of thousands and displacing two million.
As artillery fire rings out in the capital Juba and a helicopter gunship buzzes overhead, desperate work is under way to try to calm the situation and to prevent the clashes from spreading.
But huge distrust remains between Mr Kiir and Mr Machar and between their forces. The leaders may even be struggling to control their own troops. A number of peace deals have been signed - so far, none has led to lasting stability.
One foreign worker in the Gudele district, on the outskirts of the city, told the BBC he was waiting to be evacuated from the area.
He said shooting restarted at 08:00 local time (05:00 GMT) on Sunday, and had been sporadic throughout the day.
In the latest response:
Image copyright AFP Image caption Gunfire erupted shortly after Mr Machar (L) and Mr Kiir (R) met on Friday South Sudan marked its fifth anniversary of independence from neighbouring Sudan on Saturday in lockdown.
The country is so short of money that no official anniversary events were planned.
Share this story About sharing
South Sudan strife
Background
Africa
Sport Kenya doctors 'gave GB athletes banned drugs'
Full article Kenya doctors 'gave GB athletes banned drugs'
Gambia and Tanzania ban child marriage
Full article Gambia and Tanzania ban child marriage
Africa highlights: 'Fierce fighting' in South Sudan, Tanzania court outlaws child marriage
Full article Africa highlights: 'Fierce fighting' in South Sudan, Tanzania court outlaws child marriage
More Videos from the BBC
<li class="ob-dynamic-rec-container ob-recIdx-0 ob-o"> 'Iranian Hulk' signs up to fight in Syria <li class="ob-dynamic-rec-container ob-recIdx-1 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-1 ob-o"> CCTV of Texas prisoners breaking out to save guard <li class="ob-dynamic-rec-container ob-recIdx-2 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-3 ob-o"> The Senegalese Muslims who don't fast <li class="ob-dynamic-rec-container ob-recIdx-4 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-4 ob-o"> Indonesian mother describes son's battle with obesity <li class="ob-dynamic-rec-container ob-recIdx-5 ob-o">
Recommended by Outbrain
Elsewhere on BBC
Recommended by Outbrain
You Might Also Like
Top Stories
Dallas killer 'prepared larger attack' The man who shot dead five police officers in Dallas and wounded seven more was planning an even larger attack, the city's police chief says.
1 hour ago
Clashes take South Sudan 'back to war' 5 hours ago
Portugal stun hosts France to win Euros 28 minutes ago
Advertisement
Features & Analysis
Facing facts
Do people moderate their views in the light of evidence?
'Ear-hand co-ordination'
The joys of blind cricket
Street portraits
The things homeless people own
Funeral trance
World music hits played at burials and other African hits
Video 1:47
Seven days online
Street trade, missed gig and other trends of the week
Shining star
'Now is the time to cherish peerless Serena Williams'
Video 2:44
Sousan's story
The violinist who had to flee her home
'Great moments'
Euro 2016: Late goals, Wales, Iceland and Griezmann
Force of words
The enthusiastic charm offensive of China's diplomats
Most Popular popular
Most read
Advertisement
From Around the Web
<li class="ob-dynamic-rec-container ob-recIdx-0 ob-p"> The T-Shirt Of Summer Has Arrived Fast Company <li class="ob-dynamic-rec-container ob-recIdx-1 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-1 ob-p"> The World’s Most Powerful Armies. #1 Will Surprise you. Taboo News <li class="ob-dynamic-rec-container ob-recIdx-2 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-2 ob-p"> Forget Lululemon. This sweatshirt has been called the… Business Insider <li class="ob-dynamic-rec-container ob-recIdx-3 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-3 ob-p"> How Older Men Tighten Their Skin The Modern Man Today <li class="ob-dynamic-rec-container ob-recIdx-4 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-4 ob-p"> 30 World War II Facts That Will Leave You… Time To Break <li class="ob-dynamic-rec-container ob-recIdx-5 ob-p">
Promoted content by Outbrain
Ads by Google
Forces loyal to Vice-President Riek Machar say government troops attacked their positions in the capital, Juba.
But Information Minister Michael Makuei Lueth said the reports of war were "dishonest".
The UN mission said hundreds had sought shelter in its compounds, and called for leaders to restrain their troops.
UN Secretary-General Ban Ki-moon condemned what he called the "senseless violence". The UN Security Council is holding an emergency session to discuss South Sudan.
'Situation under control'
Col William Gatjiath, Mr Machar's military spokesman, told the BBC President Salva Kiir "isn't serious" about a peace agreement.
Image copyright CCTV Image caption Chinese peacekeepers were deployed as violence broke out on Friday He said "hundreds" of Mr Machar's troops had died on Sunday, and that troops loyal to Mr Machar were advancing on Juba from different directions.
Mr Lueth said government troops responded when Mr Machar's forces attacked a checkpoint, adding that those forces had now been scattered. "The situation is normal and it is under full control," he added.
The clashes follow days of fighting in the world's newest country between supporters of Mr Kiir and Mr Machar.
At least 150 people were killed in fighting on Friday, before calm was restored on Saturday. Local radio station Radio Tamazuj reported on Sunday that the death toll from those clashes may be as high as 271.
South Sudan's men of dishonour
'We want peace - and ice cream'
South Sudan: Obstacles to a lasting peace
Why does S Sudan matter so much to the US?
Jump media player
Media player help
Out of media player. Press enter to return or tab to continue.
Media captionFive years of South Sudan The violence has raised fears of renewed instability, with a 2015 peace deal failing to quell unrest.
Heavy gunfire was reported on Sunday near a military barracks occupied by troops loyal to Mr Machar.
Friday's exchanges were apparently sparked by a shootout between Mr Kiir's and Mr Machar's bodyguards. The two men met at the presidential palace on Friday, and issued a call for calm.
How did we get here?
Image copyright Getty Images Image caption South Sudan's short history has been marked by violence and poverty July 2011 - South Sudan becomes an independent country, after more than 20 years of guerrilla warfare, which claimed the lives of at least 1.5 million people and displaced more than four million.
December 2013 - Civil war breaks out after President Salva Kiir sacks the cabinet and accuses Vice-President Riek Machar of planning a coup. The war is fought broadly between the country's biggest ethnic groups - the Dinka, led by Mr Kiir, and the Nuer, under Mr Machar.
More than 2.2 million people are displaced by the fighting. Famine puts the lives of thousands at risk. Tens of thousands of people are reported killed, and Mr Machar flees the country.
Image caption There is no dominant culture in South Sudan - the Dinka and the Nuer are the largest of more than 60 ethnic groups, each with its own language and traditional beliefs, alongside Christianity and Islam August 2015 - President Kiir signs a peace deal with rebels after a threat of sanctions from the UN.
April 2016 - Mr Machar returns to South Sudan to take up his job as first vice president in a new unity government led by President Kiir.
The move marks "the end of the war and the return of peace and stability to South Sudan", Mr Kiir says.
Huge distrust - Mary Harper, BBC World Service Africa Editor
The situation in South Sudan has echoes of the days before the civil war began, in December 2013, when skirmishes between troops loyal to Mr Kiir and Mr Machar escalated into a national bloodbath, killing tens of thousands and displacing two million.
As artillery fire rings out in the capital Juba and a helicopter gunship buzzes overhead, desperate work is under way to try to calm the situation and to prevent the clashes from spreading.
But huge distrust remains between Mr Kiir and Mr Machar and between their forces. The leaders may even be struggling to control their own troops. A number of peace deals have been signed - so far, none has led to lasting stability.
One foreign worker in the Gudele district, on the outskirts of the city, told the BBC he was waiting to be evacuated from the area.
He said shooting restarted at 08:00 local time (05:00 GMT) on Sunday, and had been sporadic throughout the day.
In the latest response:
- Ban Ki-moon said: "This senseless violence is unacceptable and has the potential of reversing the progress made so far in the peace process," adding that Mr Kiir and Mr Machar order their troops to stand down immediately;
- The UN mission in South Sudan, Unmiss, said in a statement that hundreds of people had been forced to flee and seek protection in the organisation's properties. It added that there were reports troops were blocking civilians from reaching shelter
- Unmiss also said both its compounds in Juba had suffered damage, Unmiss said
- The US embassy in Juba said that the situation in the capital had "significantly deteriorated", and urged people not to leave their homes
Image copyright AFP Image caption Gunfire erupted shortly after Mr Machar (L) and Mr Kiir (R) met on Friday South Sudan marked its fifth anniversary of independence from neighbouring Sudan on Saturday in lockdown.
The country is so short of money that no official anniversary events were planned.
Share this story About sharing
South Sudan strife
- 'We want peace - and ice cream'
27 April 2016
- Malakal: The city that vanished in South Sudan
24 October 2015
- South Sudan's men of dishonour
28 September 2015
- South Sudan: Obstacles to a lasting peace
26 August 2015
- Why does South Sudan matter so much to the US?
31 August 2015
- South Sudan businesses struggle in a 'war economy'
28 August 2015
- From 'Lost Boy' to education minister in South Sudan
9 July 2015
- Tracking down South Sudan's missing
6 May 2015
- Investigating rape and murder in South Sudan's Bentiu
9 May 2014
- South Sudan: What is the fighting about?
10 May 2014
- South Sudan: Under attack outside Bor
6 January 2014
- South Sudan profile
27 April 2016
Background
- Profile: South Sudan's Salva Kiir
23 December 2013
- South Sudan's Riek Machar profiled
26 April 2016
- Profile: South Sudan army defector Peter Gadet
11 July 2014
Africa
Sport Kenya doctors 'gave GB athletes banned drugs'
- 9 July 2016
- From the section Athletics
Full article Kenya doctors 'gave GB athletes banned drugs'
Gambia and Tanzania ban child marriage
- 8 July 2016
- From the section Africa
Full article Gambia and Tanzania ban child marriage
Africa highlights: 'Fierce fighting' in South Sudan, Tanzania court outlaws child marriage
- From the section Africa
Full article Africa highlights: 'Fierce fighting' in South Sudan, Tanzania court outlaws child marriage
More Videos from the BBC
<li class="ob-dynamic-rec-container ob-recIdx-0 ob-o"> 'Iranian Hulk' signs up to fight in Syria <li class="ob-dynamic-rec-container ob-recIdx-1 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-1 ob-o"> CCTV of Texas prisoners breaking out to save guard <li class="ob-dynamic-rec-container ob-recIdx-2 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-3 ob-o"> The Senegalese Muslims who don't fast <li class="ob-dynamic-rec-container ob-recIdx-4 ob-o">
<li class="ob-dynamic-rec-container ob-recIdx-4 ob-o"> Indonesian mother describes son's battle with obesity <li class="ob-dynamic-rec-container ob-recIdx-5 ob-o">
Recommended by Outbrain
Elsewhere on BBC
Recommended by Outbrain
You Might Also Like
Top Stories
Dallas killer 'prepared larger attack' The man who shot dead five police officers in Dallas and wounded seven more was planning an even larger attack, the city's police chief says.
1 hour ago
Clashes take South Sudan 'back to war' 5 hours ago
Portugal stun hosts France to win Euros 28 minutes ago
Advertisement
Features & Analysis
Facing facts
Do people moderate their views in the light of evidence?
'Ear-hand co-ordination'
The joys of blind cricket
Street portraits
The things homeless people own
Funeral trance
World music hits played at burials and other African hits
Video 1:47
Seven days online
Street trade, missed gig and other trends of the week
Shining star
'Now is the time to cherish peerless Serena Williams'
Video 2:44
Sousan's story
The violinist who had to flee her home
'Great moments'
Euro 2016: Late goals, Wales, Iceland and Griezmann
Force of words
The enthusiastic charm offensive of China's diplomats
Most Popular popular
Most read
- 1 'Legendary' image of US protests emerges
- 2 Dallas killer 'prepared larger attack'
- 3 First Philistine cemetery revealed
- 4 Riot leaves 123 Berlin police injured
- 5 Egypt's FM in rare Israel visit
- 6 Venezuelans flock to Colombia for food
- 7 Crowdfunded NZ beach handed to public
- 8 Blair may face Iraq contempt vote
- 9 Matador killed by bull in Spain
- 10 Clashes take South Sudan 'back to war'
Advertisement
From Around the Web
<li class="ob-dynamic-rec-container ob-recIdx-0 ob-p"> The T-Shirt Of Summer Has Arrived Fast Company <li class="ob-dynamic-rec-container ob-recIdx-1 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-1 ob-p"> The World’s Most Powerful Armies. #1 Will Surprise you. Taboo News <li class="ob-dynamic-rec-container ob-recIdx-2 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-2 ob-p"> Forget Lululemon. This sweatshirt has been called the… Business Insider <li class="ob-dynamic-rec-container ob-recIdx-3 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-3 ob-p"> How Older Men Tighten Their Skin The Modern Man Today <li class="ob-dynamic-rec-container ob-recIdx-4 ob-p">
<li class="ob-dynamic-rec-container ob-recIdx-4 ob-p"> 30 World War II Facts That Will Leave You… Time To Break <li class="ob-dynamic-rec-container ob-recIdx-5 ob-p">
Promoted content by Outbrain
Ads by Google
- Reverse Mrtg Calculator
Calculate Your Reverse Mortgage How Much Money Can You Receive?
reversemortgageguides.org - Franchises under $10,000
Franchises for less than $10K. 100's of low cost franchises.
franchise.franchisegator.com - Apply For Disability
Find Out If You May Qualify For Up To $2,663/mo in Disability Benefits
www.disabilityapprovalguide.com
