article_snippet: Protesters fired gunshots and torched a local electoral office in Nigeria's oil-rich Rivers state on Sunday as Protesters marched to protest Nigeria's presidential elections, amid claims of vote-rigging and voter intimidation.
article_snippet: More than 800 people were killed in post-election violence across Nigeria's north in 2011 after charges that Nigeria's presidential elections were illegitimate.
article_snippet: Now Nigeria has just held what are thought to be the closest elections since a return to democracy in 1999 after decades of military rule.
article_snippet: After the protests in Rivers, Buhari's All Progressives Congress demanded Nigeria's presidential elections be canceled.
article_snippet: Read more: Nigerian election extended one day .
article_snippet: If the opposition believes the opposition has been rigged out of victory by the ruling party, then the protests in Rivers could spread to northern Nigeria.
article_snippet: northern Nigeria's vote had been scheduled for February 14, but on February 7, northern Nigeria's election commission announced Nigeria's election commission would be postponed for six weeks because of security concerns, with the military needing more time to secure areas controlled by extremist group Boko Haram.
article_snippet: The controversial decision was unpopular among many Nigerians and led to widespread protests.