A bomb attack in Bamenda city is said to have seen a number of police officers injured.
Riots were then seen as a response in the northwest of the country.
The authorities have imposed a 24 hour curfew.
The African Biblical Leadership Initiative, a Bible Society initiative, which is being held in the Cameroon capital, has called for prayer to calm the situation.
Delegates were led in prayer by Babila Foncham of the Presbyterian Church in Cameroon, for what he described as "desperate times".
He prayed: "God, we commit Cameroon into your hands. We call for your decisive intervention, that Christian men and women among the crowd would act as instruments of peace and non-violence.
"Heal our land, Lord, and grant us peace. Forgive us Lord and have mercy upon us. Don't allow us to plunge into war and violence."
Bible Society Chief Executive Paul Williams was a keynote speaker at the conference. He said: "ABLI has called for peace and reconciliation at this troubled time in Cameroon.
"We call on Christians especially to work for peace and set an example by abstaining from violence. Our prayer for every nation in Africa is for honest leaders who will serve their people and be peacemakers."