UN demands immediate end to Sudan oilfields fighting
The UN Security Council has called for an immediate and unconditional end to fighting on Sudan's southern border.
It expressed its "deep and growing alarm" over the "escalating conflict", and said the situation threatened to return the countries to full-scale war.
Since Tuesday, South Sudanese forces have occupied the Heglig oilfield, on its disputed border with Sudan.
It said the Sudanese air force must stop bombing, while South Sudan withdraw from the Heglig oilfields.
The council also called on all forces to pull back 10 kilometres (six miles) from their shared border, and for the countries to hold an immediate presidential summit, as had been planned previously.
Sudan's ambassador at the UN, Daffa-Alla Elhag Ali Osman, welcomed the statement.
He said if Southern troops don't comply than Khartoum will "chase them out" and "hit deep inside South Sudan".
He dismissed the Council's demand that Sudan also end aerial bombardments, saying reports of such attacks were fiction.
South Sudan's UN ambassador Agnes Oswaha supported the idea of talks, but said outstanding issues needed to be resolved immediately.
She added that South Sudan would only withdraw from Heglig if an international force was deployed to the area.
Earlier the President of South Sudan, Salva Kiir, told his parliament that he will not withdraw his troops.
He urged MPs to mobilise their supporters and prepare for war should Khartoum refuse to talks.
Meanwhile, South Sudan's army spokesman told the BBC Sudanese aircraft had bombed two towns, killing one person.
The fighting along the oil-rich border region is the worst since South Sudan gained independence last July.
Speaking in Geneva earlier, UN Secretary General Ban Ki-moon said he was gravely concerned about the situation and urged both governments to "cease hostilities immediately" and hold a presidential summit to negotiate a solution.
On Wednesday, Sudan admitted that South Sudan had seized the town of Heglig, which is home to facilities that account for around half of Sudan's oil production.
The area is internationally recognised as Sudanese territory, but South Sudan disputes this.
South Sudan says it took Heglig in order to prevent the Sudanese army organising attacks from there.
In response, Sudan ordered a general military mobilisation and has vowed to act with "all means" against the attack. It has also pulled out of African Union-led negotiations with South Sudan.
In parliament in South Sudan's capital, Juba, on Thursday, Mr Kiir said he told Mr Ban: "I'm not under your command" and that although he did not want war with Khartoum, his country had to act in self-defence.
"I always say we will not take the people of South Sudan back to war, but if we are being aggressed [attacked] like this we will have to defend ourselves," he said.
The president, a former rebel commander, said that MPs, who are returning to their consistencies for a parliamentary recess, must mobilise all their "people" and tell them to forget "tribal conflicts" and unite to confront a more pressing danger.
The BBC's Nyambura Wambugu in Juba said parliamentarians responded with cheers, the chanting of the ruling party slogans and war songs used during the two-decade civil war.
MPs do not necessarily want war but were happy that the president reflected the anger many in South Sudan feel about the months of Sudanese bombardments, she says.
In Khartoum, Sudan's leader Omar al-Bashir said war was "not in the interests of either South Sudan or Sudan".
"Our brothers in South Sudan have chosen the path of war, implementing plans dictated by foreign parties who supported them during the civil war," AFP news agency quotes him as saying.
Earlier in the day, Sudanese aircraft dropped five bombs on a bridge linking Bentiu and neighbouring Rubkotna, in Unity state, leaving at least one person dead and four injured, according to South Sudan officials.
"This is an indiscriminate bombing by Sudan's armed forces that has been conducted for almost one year now. They are bombing innocent civilians in northern parts of Unity state," army spokesman Col Philip Aguer told the BBC.
Correspondents say Sudan, having lost most of its oil when the south seceded, will not tolerate losing any more.