President Mohamed Ould Abdel Aziz has won another five-year term after receiving 82 percent of the vote, officials said Sunday, after an election boycotted by most of the opposition.

Abdel Aziz, an ally of Western powers in the fight against al-Qaida-linked Islamists in West Africa, faced no major challenger to his rule in Saturday's election in his vast desert nation, which straddles Arab Africa and sub-Saharan Africa.

Abdel Aziz's closest rival, anti-slavery campaigner Biram Ould Dah Ould Abeid, came in a distant second with 9 percent of the vote, said the National Election Commission.