Ghana's government Monday in court accused the country's main opposition party NPP of making up election results in its legal challenge against the victory of President John Dramani Mahama in last year's poll.
The case being argued at Ghana's Supreme Court has the potential to overturn the results of the elections, which international observers called free and fair.
If the suit by the opposition New Patriotic Party (NPP) succeeds, the party's candidate, Nana Akufo-Addo, could be declared the winner of the presidency.
Judges of the court could also rule that Mahama's win was legitimate or void just enough votes to force a run-off.
NPP claimed to the court that 4.3 million votes were improperly cast and asked the highest judicial instance to void them.
But lawyers for the presidency and electoral commission argued that the NPP made up their evidence.
"I'm suggesting that you have repeatedly used the same polling stations to make up your numbers," the electoral agency's defence lawyer, Tony Lithur, told NPP vice presidential candidate Mahamudu Bawumia.
Official results from the December 7-8 polls showed Mahama won 50.7 percent of the vote compared to Akufo-Addo's 47.7 percent.
Hearings in the case, which began last week, are expected to continue through this week.