Nigeria's Goodluck Jonathan has been sworn in as president for a new four-year term, following a clear poll win. Foreign heads of state attended the lavish ceremony, which began with a military parade and inspection at Eagle Square in the country's capital, Abuja. Mr Jonathan was promoted from vice-president after Umaru Yar'Adua died in office in 2010. Despite his election win the country still has serious divisions and there were deadly riots after polling. Power sector The election was largely considered free and fair but hundreds of people were killed in three days of rioting following the announcement of the result. Mr Jonathan, 53, won nearly 60% of the vote. He is a southern Christian and had defeated his leading challenger from the mainly Muslim north. Mr Jonathan's nomination also required changing a ruling party tradition of alternating between candidates from the north and south. The BBC's Jonah Fisher in Abuja says the pressure is now on the winner to deliver on his many election promises. Mr Jonathan is famous for his wide-brimmed hat - on display on inauguration day - and his love of Facebook, but enters office with a "to-do" list that would daunt many, he adds. On the campaign trail Mr Jonathan said fixing Nigeria's threadbare power sector would be a priority as would be reforming agriculture to increase food production. Source: BBC