Sunday’s killings were an especially vicious expression of long-running hostilities between Christians and Muslims in this divided nation. Jos and the region around it are on the fault line where the volatile and poor Muslim north and the Christian south meet. In the past decade, some 3,000 people have been killed in interethnic, interreligious violence in this fraught zone. The pattern is familiar and was seen as recently as January: uneasy coexistence suddenly explodes into killing, amplified for days by retaliation.
Mr. Adamu, a Muslim herder, said he went to Dogo Na Hawa, a village of Christians living in mud-brick houses on dirt streets, to avenge the killings of Muslims and their cattle in January.
The operation had been planned at least several days before by a local group called Thank Allah, said one of Mr. Adamu’s fellow detainees, Ibrahim Harouna, who was shackled on the floor next to him. The men spoke in Hausa through an interpreter.
“They killed a lot of our Fulanis in January,” Mr. Adamu said, referring to his ethnic group. “So I knew that this time, we would take revenge.”
His victims were sleeping when he arrived, he said, and he set their house on fire. Sure enough, they ran out.
“I killed three people,” Mr. Adamu said calmly.