The nation's Interior Minister Paul Atanga Nji has stated that opposition leader Issa Tchiroma Bakary will undergo legal proceedings over claims that he provoked "aggressive post-election demonstrations".
At least 4 demonstrators have been killed during clashes between police and military and demonstrators since the electoral process on October 12, with the 92-year-old head of state securing an eighth term in office.
The opposition leader maintains that he won the election, a statement rejected by Biya's ruling party, the CPDM.
Aggressive responses by law enforcement on demonstrators have alarmed the world leaders, with the United Nations, African Union and EU urging restraint.
Recently, the interior minister alleged the opposition figure of coordinating what he referred to as "illegal" rallies leading to the fatalities, and also rebuked him for announcing success in the election.
He noted that Tchiroma Bakary's "associates involved in an subversive plot" will also face legal action.
Paul Biya, who took control in 1982 and is now the most elderly national leader, obtained the October 12 vote with 53.7% of the ballots, compared to just over a third for his opponent, according to the electoral authority.
Issa Tchiroma is yet to respond to the government's decision to prosecute him, but he had before stated that he rejected a stolen vote - and that he was fearless of being detained.
When results were announced, he reported that gunmen opened fire on protesters assembled near his home in Garoua, causing the death of at least two civilians.
Earlier this week, the government official disclosed that an inquiry would be launched into violent incidents surrounding the announcement of the election results.
"In the course of these incidents, some of the perpetrators died," he commented, without providing a precise figure of protesters who have been lost their lives in the clashes.
Nji further mentioned that a number of personnel of the law enforcement also suffered major harm.
Even though Nji insisted the state of affairs across the country was now under control, demonstrators continue to protest in certain regions of the nation, especially in these two cities, where protesters established barricades on Tuesday, and burnt tyres on the streets.
Observers caution that the post-electoral violence could plunge the nation into a political crisis.