Sudan "is prepared to undertake the peacekeeping process in Darfur if the AU abandons or relinquishes the mandate it was granted by the government," local radio quoted Mr Beshir as telling a cabinet meeting on Sunday.
The renewed opposition to the proposed UN takeover of peacekeeping duties from the cash strapped AU comes amid heightened tensions between the Sudanese government and the UN.
The foreign ministry summoned on Monday one of the UN’s top envoy’s in the country to explain why it allegedly allowed a Darfur rebel leader to be transported on a UN flight over the weekend.
Suleiman Jammus, a member of a the rebel Sudan Liberation Movement (SLM), was supposedly taken Saturday from the main Darfur town of El-Fasher to South Kordofan state on a UN helicopter flight, the foreign ministry said.
Jammus belongs to the wing of the SLM that opposes the fragile peace agreement signed between Minni Minawi's SLM faction and Khartoum in Nigeria last month.
"It was clear that the act was planned to take place behind the back of the Sudanese authorities," a government statement said.
Adding, that it considered the incident "a flagrant violation of the country's sovereignty and a violation of the agreement under which the UN operates in Sudan."
UN offices in Khartoum did not confirm the incident and refused to comment on the government's reaction.
With the exception of the two largest agencies in Darfur, the World Food Programme and UNICEF, the UN’s children's fund, the foreign ministry also suspended all UN operations in region until further notice.
UN unpopular
On Sunday, up to 5,000 demonstrators, mainly from the ruling National Congress Party's student and youth organisations, protested in the capital against the UN peacekeeping plan, chanting anti UN and anti US slogans.
"The experience of foreign intervention in other countries, including Iraq, shows that it is not in the interest of the people," Ali Yehya, the speaker of the Council of States, the upper house of parliament, told the demonstrators.
Even after completing a mission aimed at mustering support from the authorities for a UN deployment, the organisation’s undersecretary general for peacekeeping operations Jean-Marie Guehenno reported no breakthrough.
Mr Beshir has repeatedly warned he will turn Darfur into "a graveyard" for Western troops, accusing them of wanting to "recolonise Sudan".
The UN wants to replace the cash-strapped 7,000-strong African Union peacekeepers, who have failed to maintain complete peace in Darfur over the last two years, with its own contingent.
SLM spokesman Majub Hussein, who supports the UN’s plan, criticised the government’s order to suspend most UN operations, telling news agency AFP that it is "a violation of international conventions on humanitarian issues by a government that systematically sought to starve the population of Darfur."
Decades of tribal fighting in the troubled Darfur region erupted into all-out violence in 2003, when ethnic minority rebels took up arms, accusing the government of neglect and calling for autonomy.
In response, the regime allegedly unleashed its Janjaweed proxies on Darfur's population. The combined effect of war and famine has killed some 300,000 people in the province and displaced nearly 2.50 million.