Jakarta governer Joko Widodo expected to be declared winner, but rival Prabowo Subianto likely to challenge the result.
Indonesian election officials are expected to officially declare the winner of a hotly contested presidential election.
A spokesman for the Election Commission said the announcement would be made by 11:00 GMT on Tuesday.
Private tallies show Jakarta Governor Joko "Jokowi" Widodo beat
former special forces chief Prabowo Subianto by about five percentage
Prabowo has refused to concede defeat and is expected to
challenge the result in the Constitutional Court, though experts say
such an appeal is unlikely to succeed.
Candidates can lodge complaints with the Constitutional Court,
as did the losers of the previous two elections since strongman ruler
Suharto was forced to step down in 1998 after more than three decades in
The Court must return a verdict on any challenge within two weeks and it cannot be appealed.
Election officials said reports of irregularities had been
investigated, but the number of disputed votes is limited to thousands
Analysts believe a reversal of up to seven million votes would be needed to overturn Jokowi's lead and hand victory to Prabowo.
Outgoing President Susilo Bambang Yudhoyono urged whoever loses
the closest presidential race in Indonesia's history to acknowledge the
outcome to avoid violence in the world's most populous Muslim nation.
"Admitting defeat is noble," the president told reporters on Monday, in a clear reference to Prabowo.
Hundreds of thousands of police and military are on heightened
alert across the vast archipelago of 240 million people, the world's
third largest democracy. There have been no reports of major violence.