Bujumbura

Gen. Adolphe Nshimirimana was killed when men in a car shot at him and his bodyguards while traveling in the Kamenge neighbourhood, Willy Nyamitwe told The Associated Press Sunday.

The attackers also lobbed a grenade into Nshimirimana's vehicle, and the general was evacuated before he later died from his wounds, he said.

The killing is likely to stoke tensions in Burundi, which has been wracked by violence since April when it was revealed that Nkurunziza would seek a third term in office. 

Turnout was low in the capital, Bujumbura, and one province but 16 other provinces had a good level of voters, said the head of Burundi's electoral commission Claver Ndayicariye. Results are expected in two days, he said.

With some of the opposition boycotting the election and others charging that they were not allowed to campaign, Nkurunziza, 51, is not facing a strong electoral challenge.