YAOUNDE, Cameroon (AP) — The world’s oldest president, Cameroon ‘s 92-year-old Paul Biya, has won election again, the country’s top court said Monday, after days of protesters’ clashes with security forces left at least four people dead as opposition supporters demanded credible results.

Biya has led the central African nation since 1982, ruling longer than most citizens have been alive. Over 70% of the population of almost 30 million is below 35. The Oct. 12 election has displayed growing tensions between Africa’s youth and its many aging leaders.

The Constitutional Council said Biya received 53.66% of votes while former ally Issa Tchiroma Bakary got 35.19%. The turnout was 57.7%.

In a social media post after the announcement, Tchiroma asserted that security forces had shot at civilians, killing two in his hometown of Garoua.

“Shooting point-blank at your own brothers — I can’t help but wonder if you’re mercenaries,” he posted. “Kill me if you want, but I will liberate this country by any means necessary. What blatant impunity.”

There was no immediate comment from authorities.

Tchiroma claimed victory days before Monday’s announcement, citing results he said were collated by his party. Biya’s party members dismissed the claim.

The four protesters had been shot dead in Douala, the economic capital, on Sunday, as hundreds of people stormed streets in several cities.