Escorted by security forces, hundreds of people held a procession through Kumba town in southwest Cameroon, the site of a school attacked by gunmen.
At least seven children were killed in the raid according to officials.
People carried placards denouncing the attack, while calling for an end to the violence which has gripped the region since 2016.
The administrative head of Meme division Ntou’ou Ndong Chamberlin said, instead of 6, there are now seven corpses in the mortuary.
He said the killings must stop because children are the future. They need education, they are the future leaders.
The UN called the shooting ‘the worst atrocity’ since schools reopened in Cameroon two weeks ago.
Fighting between Cameroonian forces and separatist rebels in the English-speaking northwest and southwest regions has killed thousands. Both sides have been accused of committing atrocities.
No group has claimed responsibility for the attack but authorities have put the blame on separatist fighters.