Al-Bashir and Kiir agreed to reconvene another summit to discuss the final disposition of the disputed region.
Sudanese President Omar al-Bashir had vowed to "never give up" the disputed region, which his nation also claims.
They were stopped not in the sensitive disputed region between Iraq and Iran, but lower down in the Gulf.
Sudanese President Omar al-Bashir had vowed to "never give up" the disputed region.
The disputed region is on the border between the two countries created last year when South Sudan split from Sudan.
CNN: South Sudan says it is withdrawing from disputed oil region
Sudan claims Heglig's oil fields, which account for about half of the nation's oil production, and Sudanese President Omar al-Bashir had vowed to "never give up" the disputed region.
CNN: South Sudan says it is withdrawing from disputed oil region
Oscar-winning director Steven Spielberg says he is planning to produce a film, a part of which will be set on the de facto border in the disputed region of Kashmir.
Yet they could not reach a deal on the status of Abyei, a disputed region claimed by both countries, which has been a contentious issue since the South declared independence on July 9 of last year.
The group, which was founded by scientists who had worked on the first atomic bombs in the second world war, listed the continuing crisis between India and Pakistan over the disputed region of Kashmir as one of their concerns.
Jean Monnet, a brandy merchant from Cognac, in southern France, and Robert Schuman, the French foreign minister, a lawyer from the disputed region near the French-West German border, worked together on the "Schuman Plan, " which Schuman proposed on May 9, 1950.
Police officer Abdul Gani Mir said one suspected militant also was killed in the fighting 40 kilometers (25 miles) south of Srinagar, the main city in the disputed Himalayan region.
Talks between Sudanese President Omar al-Bashir and his South Sudan counterpart Salva Kiir concluded in the Ethiopian capital of Addis Ababa, where the two agreed to temporary arrangements over a disputed oil-rich region claimed by both countries.
The fate of the Abyei region and other disputed border areas are also a point of contention.
Kirkuk is the most bitterly contested of Iraq's disputed territories, claimed by both the Kurdish region and Baghdad.
BBC: Suicide attack in Iraq kills 10 outside political office
Kidnapping is a big problem throughout the region, though just how big and whether it is worsening are disputed.
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