Abuja - First results trickled in from Nigeria's closely fought general election on Monday, with protests over the conduct of the vote and a warning of manipulation of the count adding to fears of violence.
The presidential election pitting President Goodluck Jonathan against former military ruler Muhammadu Buhari is the closest in Nigeria's history, and the first with a credible opposition challenge.
International election observers gave broadly positive reactions to the conduct of the vote, despite late delivery of election materials and technical glitches with new voter authentication devices.