(BBC) Nigeria election: Goodluck Jonathan appeals for calm

Nigerian President Goodluck Jonathan has appealed for an end to “unnecessary and avoidable” post-election violence across the north of the country.

Incumbent Mr Jonathan has been declared winner in the presidential poll, with the electoral commission saying he received about 57% of the vote.

Rioting spread across the Muslim north – the opposition’s powerbase – as the outcome became clear.

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