NPP supporters expressing anger at Mahama's victory
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Ghana election: NPP considers challenge to John Mahama win

10 December 2012 Last updated at 18:45 GMT

Ghana's main opposition party says it is considering legal action to annul President John Mahama's victory in Friday's fiercely contested election.

NPP chairman Jake Obetsebi Lamptey told the BBC it would decide on Tuesday whether there was "robust" evidence to prove the result had been manipulated.

The election commission said Mr Mahama had secured 50.7% of votes, compared to NPP candidate Nana Akufo-Addo's 47.7%.

Akwasi Sarpong reports.