Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Nigeria's Jonathan Secures Unbeatable Poll Lead; Riots Erupt VOA News April 18, 2011 People holding wooden and metal sticks demonstrate in Nigeria's northern city of Kano where running battles broke out between protesters and soldiers on April 18, 2011 as President Goodluck Jonathan headed for an election win Photo: AFP People holding wooden and metal sticks demonstrate in Nigeria's northern city of Kano where running battles broke out between protesters and soldiers on April 18, 2011 as President Goodluck Jonathan headed for an election win Riots erupted across northern Nigeria on Monday after President Goodluck Jonathan secured enough votes to win the presidential election. Opposition supporters claimed Saturday's vote had been rigged and torched homes, burned tires and hurled rocks at police to protest the results. Many in the Muslim-majority north backed the top challenger, Muhammadu Buhari, a Muslim and former military ruler. Jonathan, a Christian, dominated the mostly Christian south. Riots broke out in the northern state of Kaduna, where a 24-hour curfew has been imposed. Authorities reported unrest in the city of Kaduna and Zaria, where angry rioters clashed with police and set homes on fire. In the capital of Kano state, security forces fired shots into the air as stone-throwing youths took to the streets and chanted support for Buhari. Government and security officials met in the capital, Abuja on Monday to discuss the post-election riots. President Jonathan emerged as the unbeatable winner after all but five of the country's 36 states reported poll results. Election officials say Jonathan has met the requirements to avoid a run-off vote. A candidate needs a simple majority and at least a quarter of the vote in 24 states. Observers have said Saturday's vote proceeded calmly, with few instances of cheating. Security was tight at polling stations across the West African nation, which has a history of rigged voting and election violence. There were two explosions in the northeastern city of Maiduguri early Saturday. President Jonathan has promised to improve the country's economy, health and education. He assumed the presidency last year following the death of his predecessor, Umaru Yar'Adua. Buhari has said he will not contest the election results. Some information for this report was provided by AP, AFP and Reuters. .