Ghana's main opposition party says it will formally challenge the outcome of this month presidential election won by incumbent Nana Akufo Addo.

My media task.

Akufo Addo was declared the winner of the December 7th election with 51% of the vote.

Opposition candidate and former president John Mahama received 47%.

The campaigns were filled with heated rhetoric on election related violence that killed at least five people.

The decision to challenge the outcome is a rarity.

Ghana has a reputation as one of West Africa's most stable democracies.

The opposition National Democratic Congress has yet to produce evidence of fraud on provided no details about the case it would file.

It's a rare move in a country where losing candidates typically concede defeat.

Only one other Ghanaian presidential election in 2000 and 12 was formally contested by the losing candidate.

On it was the same old rivals back then.