France, Sept. 19 -- Cote d'Ivoire's presidential election campaign is taking shape, with four challengers hoping to defeat longtime incumbentAlassane Ouattara in the 25 October vote - but no candidates from the country's two main opposition parties. While analysts say the run-up has so far been peaceful, some fear that young voters in particular are disengaging from politics, in response to previous election violence.

Ouattara, 83, has been in power since 2011 and changed the constitution in 2016 to remove presidential term limits.

Four candidates are standing against him, having been ruled eligible by the country's constitutional court:former ministers Jean-Louis Billon, Ahoua Don Mello and Henriette Lagou, andSimone Gbagbo, who is a f...