Polling stations for the presidential and parliamentary votes opened on Wednesday. Thirty candidates, including former prime ministers, Anicet-Georges Dologuele and Martin Ziguele, are running for president.
The elections had been postponed four times since February 2015 due to insecurity and logistical challenges.
In a Tuesday statement, the United Nations (UN)’s Secretary General Ban Ki-moon called for calm and credible elections in the African country.