Liberia's opposition is crying foul in the first presidential election the nation has held for itself since the end of the civil war in 2003.
With 80 per cent of the vote counted, President Ellen Johnson Sirleaf's Unity party is ahead but facing a runoff.
Her rivals say the Election Commission has favoured the new Nobel laureate.
But the the man in charge of the vote says the claims are baseless.
Al Jazeera's Yvonne Ndege reports from the Liberian capital, Monrovia.