Preliminary results from the parliamentary election in Angola show the governing MPLA heading for a landslide victory.
The electoral commission said the party had received more than 81% of the vote, based on preliminary figures.
The main opposition party, Unita, wants a re-run in the capital, Luanda, saying voting there was chaotic.
However, observers from the southern African regional grouping, Sadc, say the poll was transparent and credible.
This election is seen as a vital step in the country's recovery from decades of civil war. It is the oil-rich nation's first election in 16 years.
Fourteen parties took part but the contest has been mainly between the ruling MPLA party and its long-term rivals, Unita.