Cameroon opposition candidate Issa Tchiroma declared victory late on Monday in the country’s October 12 presidential election, urging President Paul Biya to accept defeat and “honour the truth of the ballot box”.

“Our victory is clear. It must be respected,” Tchiroma said in a speech on his Facebook page from his hometown of Garoua in the north of the Central African state. “The people have chosen. And this choice must be respected.”

Tchiroma, 76, a former government spokesperson and employment minister, broke ranks with Biya earlier this year and mounted a campaign that drew large crowds and endorsements from a coalition of opposition parties and civic groups.

Biya, 92, the world’s oldest serving head of state, is seeking an eighth term after 43 years in power. Analysts had expected his control over state institutions and a fragmented opposition to give him an edge in the election, despite growing public discontent over economic stagnation and insecurity.

Tchiroma praised voters for defying intimidation and staying at polling stations late into the night to protect their ballots.