The incident occurred in the Punpumule district of Garua city in the Far North region, which was the scene of angry post-election demonstrations by supporters of opposition candidate Issa Chiloma Bakari, who claimed victory in the October 12 vote.
The victim, a female teacher at a nearby Arab elementary school, was shot and killed on her way home from work, local news portal Revred Pearl said.
Protesters took to the streets of Garoua, demanding that the results of the ballot box that gave victory to Ciroma be respected.
This city is the home of Chiroma. Similar protests took place in the capital, Yaounde.
Footage shared on social media platforms showed demonstrators holding placards claiming that election officials had “manipulated the vote count” in favor of incumbent President Paul Biya.
Territorial Administration Minister Paul Atanga Nzi said in a statement on Tuesday that 20 people had been arrested and will be charged with rioting and inciting rebellion.
He called on people to “remain calm” and “trust” the institutions in charge of the electoral process as they await the results of the presidential election.
Cameroon’s Constitutional Council is expected to announce the final results on Thursday.
The minister warned that the government would not tolerate any attempts at “riots or violations of public order.”
Earlier, the national electoral body announced that it had completed counting the ballots and was ready to submit provisional results to the Constitutional Council.
Unofficial results published by local media showed Mr Biya leading with more than 50% of the vote.
MNA/