Police in Ghana have arrested more than 100 people - mostly opposition supporters of President-elect John Mahama - over acts of lawlessness.

Ghana’s former leader John Dramani Mahama was officially declared the winner of the presidential election on Monday after voters vented anger at the government’s handling of the economy.

Ghana's electoral commission on Monday declared ex-president and main opposition leader John Dramani Mahama winner of Saturday's presidential election with 56.55% of the vote, according to provisional results.

STORY: JOHN DRAMANI MAHAMA: "I am deeply honored and humbled to receive such an overwhelming endorsement from the Ghanaian people."Ghana's John Dramani Mahama pledged governance reforms and measures to "reset" the nation in a victory speech after winning Saturday's presidential election.

Ghana pipo don vote to remove dia ruling goment wia don dey power for eight years. Since di kontri begin dey do democratic elections in di fourth republic from 1992, no party in goment bin dey power for more dan eight years.

Ghana's opposition leader John Mahama officially won the country's election on Monday, easily defeating the ruling party candidate after voters punished the government's economic management and high living costs.

More than 100 persons, predominantly supporters of Ghana’s President-elect John Mahama, have been arrested following post-election violence that has rocked the country. The unrest has included attacks on state institutions,