Demonstrators in Gabon clashed with police and set part of the parliament building on fire on Wednesday amid anger among opposition supporters over President Ali Bongo’s re-election in polls that his main rival, Jean Ping, claimed to have won. Opposition members of the Central African oil producer’s electoral commission rejected Saturday’s first-past-the-post election result, which would see the Bongo family’s nearly half-century in power extended another seven years. France, the United States, and the European Union all urged calm on Wednesday and called upon Gabonese authorities to release the results of individual polling stations for greater transparency. Bongo won 49.80 percent of votes, compared to 48.23 percent for Ping, with a turnout of 59.46 percent, according to results announced region by region by Interior Minister Pacome Moubelet Boubeya.