​​​​​​​ISTANBUL

Cameroon's Interior Minister Paul Atanga Nji vowed legal action Tuesday against main opposition leader Issa Tchiroma Bakary, accusing him of inciting violence in post-election unrest, according to media reports.

Authorities are collecting social media messages and videos deemed “false” and disruptive to the “established order” so that the authors will face prosecution, “just like candidate Issa Tchiroma and his affiliates, who are responsible for an insurrectional plan aimed at plunging the country into chaos,” Nji said at a news conference in Yaounde, according to the Actu Cameroun news website.

Results announced Monday by the Constitutional Council said President Paul Biya was reelected with 53.66% of the vote, securing an eighth term and extending his 43-year rule as the world’s oldest sitting president.

Tchiroma has claimed victory in the Oct. 12 election. His supporters, responding to his call for protests Sunday, were confronted by security forces ahead of the announcement, resulting in at least four civilian deaths.

Nji said the security situation was under control despite localized incidents, adding that the electoral process had concluded with the Constitutional Council's proclamation of results.​​​​​​​