Sudan's President Omar al-Bashir has been declared the winner of this month's landmark elections, despite facing war crimes charges over Darfur.
Former rebel leader Salva Kiir has been confirmed in power in the semi-autonomous South in the first polls since the north-south war ended.
The polls were Sudan's first multi-party elections in 24 years.
Observers and opposition parties have complained of fraud and - particularly in the South - of intimidation.
Sudan's election commission said Mr Bashir had received 68% of the vote.
It also said Mr Kiir, leader of the Sudan People's Liberation Movement (SPLM), had received 93% of the southern vote.
The BBC's James Copnall in Khartoum says President Bashir's re-election could be interpreted as a popular rebuke for the International Criminal Court, which has issued an arrest warrant against him for alleged war crimes in Darfur.
在喀土穆的英国广播公司记者詹姆斯 Copnall 说巴希尔的连任将会被理解为对国际刑事法庭对他发出在达尔富尔的战争罪指控的逮捕令的一个流行谴责。
Sudan's leader strongly denies the charges.
His two main challengers withdrew before the elections began, claiming that the process had already been rigged.
Our correspondent says these accusations and withdrawals have dented the credibility of the elections.
The SPLM joined a national coalition government after a 2005 peace deal but relations between the supposed partners remain tense.
A referendum is due in 2011 on whether the South, where most people are Christian or follow traditional religions, should secede from the Arab-dominated mostly-Muslim North.
Mr Bashir has said he would respect the outcome of the referendum but some fear conflict could resume, especially in the oil-rich border region.
Speaking after the poll result was announced, Mr Bashir said: "The referendum in South Sudan will take place on schedule."
The EU and the Carter Center said the polls were below international standards.
But former US President Jimmy Carter said he believed the international community would recognise the winners all the same.
Mr Bashir and his National Congress Party were already well ahead in the results already announced from the 11-15 April elections.
As well as the national and southern presidential contests, elections were also held for the national, regional and state parliaments and state governors.
Tension in Sudan was raised over the weekend, with reports of clashes along the north-south border.
Some 55 people were said to have been killed in clashes between an Arab community and southern soldiers.
The weekend violence was the most serious since the polls.
The clashes reportedly began over grazing rights for cattle - a common source of conflict in the area.
But southern government officials say their soldiers were attacked by members of the northern army - charges denied in Khartoum.