Zimbabweans have been studying the first results of their elections on Saturday.
Supporters of the opposition MDC began to celebrate on the streets in some areas, as their party claimed victory on the basis of unofficial, partial results.
As the count got under way, electoral officials warned the full results night not be known for several days.
Voters were still passing through polling stations on Saturday evening as Robert Mugabe, in power since 1980, faced his most serious electoral challenge in years.
Dzingai Karidza, 46, cast his vote in Highfields Township, the heartland of nationalist politics in Zimbabwe.
Zimbabweans have become accustomed to waiting in line - facing food shortages and hyperinflation in recent years.
The Bulawayo house of aspiring MP Judith Mkwanda was petrol-bombed on the eve of polls. Nobody was hurt.
Mr Mugabe is standing for his sixth term in office at the age of 84 as his country's economy reels.
Veteran opposition leader Morgan Tsvangirai is challenging Robert Mugabe again.
This vote has added interest because a former Mugabe ally, Simba Makoni, is now also standing against him.
On the eve of polls, cameras recorded Zimbabweans illegally escaping into South Africa from their troubled homeland.