A Muslim mob has destroyed a church compound in Sudan, the pastor said on Sunday, amid a mood of nationalist fervor after Khartoum said it liberated an oilfield occupied by South Sudan.

Pastor Yousif Matar Kodi said hundreds of people descended on a farm and training compound run by the Sudan Presbyterian Evangelical Church in Khartoum on Saturday morning.

The entire population of the Heglig area fled a military standoff between Sudan and South Sudan, leaving thousands of civilians displaced in the open, the United Nations said on Sunday.

"According to the government of Sudan’s Humanitarian Aid Commission (HAC) and other reports received by the U.N., the entire civilian population of Heglig town and neighboring villages fled," the U.N.'s humanitarian agency said.

Four Togolese peacekeepers have been shot and wounded in separate attacks in Sudan's Darfur region, the AU-U.N. mission said on Saturday.

The attacks occurred on Friday, the same day the head of the African Union-United Nations Mission in Darfur (UNAMID),Ibrahim Gambari, expressed concern that rebels were exploiting a deadly stand-off between Sudan and South Sudan.

U.S. President Barack Obama late Friday called for an end to fighting between Sudan and South Sudan and negotiations between the leaders of the two countries to settle their conflict.

"We know what needs to happen -- the government of Sudan must stop its military actions, including aerial bombardments," Obama said in a videotaped message to the people of the two countries.

Sudanese forces have retaken the main town in the Heglig oil region 10 days after South Sudanese troops seized it, the defense minister said on Friday.

"Our troops were able to liberate Heglig town by force, and captured it at 2:20 pm (1120 GMT) today," Abdelrahim Mohammed Hussein announced on state television.

Eleven Central African troops belonging to a regional border task force were killed in Sudan by rebels using gunfire and rocket-propelled grenades, officials said Friday.

"We deplore 11 deaths and nine wounded on the Central African side. The attack targeted the headquarters of the tripartite force based in Sudan in the Am Dafok region," a government source in Bangui said, adding the incident took place on Wednesday.

Rebels in Sudan's Blue Nile said on Friday that they had killed 79 government troops and militiamen in two ambushes in the ethnically divided state near the border with South Sudan.

The attacks came on Tuesday and Wednesday in roughly the same area, mountainous terrain about 35 kilometers south of the state capital Ed Damazin, said Arnu Ngutulu Lodi, spokesman for the rebel Sudan People's Liberation Movement-North (SPLM-N).

Sudan's President Omar al-Bashir threatened Wednesday to overthrow South Sudan's "insect" government, as world powers tried to pull the rivals from the brink of an all-out war after the South seized a key oil field.

"Our main target from today is to liberate South Sudan's citizens from the SPLM (Sudan People's Liberation Movement)," Bashir said, adding that the southern regime cannot be called a "movement".

South Sudanese forces have made a diversionary attack near the contested Abyei region, state-linked media in Khartoum said, as the South vowed to hold its position in a seized oilfield further east.

The attack struck Sudanese troops in the Bahr El Arab river area, 62 kilometers (38 miles) south of El Meiram, on Tuesday, said the Sudanese Media Centre (SMC) which is close to the security apparatus.

United Nations rights chief Navi Pillay on Tuesday called for a halt to "deplorable attacks" by Sudanese forces on civilian areas in South Sudan.

Pillay condemned what she described as indiscriminate aerial bombing of some parts, including Mayom and Bentiu in Unity State, leaving eight dead and many injured since Saturday.