(The leader of the displaced Fulani herdsmen Haruna Usman in Barkin Kogi, Zango Kataf, Kaduna State March 22, 2014. Picture taken March 22, 2014. REUTERS/Afolabi Sotunde)

When Fulani raiders carrying rifles, machetes and clubs stormed his village one night last month, Pius Nna was stunned to see his teenage nephew among them.

“He was leading them and telling them to check very well, because my house would have a lot of people in it and they would be sure to find someone to kill,” said Nna, a tall farmer in his mid-60s who said he escaped by fleeing into the bush.

Sitting in a courtyard littered with rubble, Nna told how his sister’s son, whose father is a Muslim Fulani, had led the raiders to burn down his farm in the attack on Ungwan Gata village, one of several mostly Christian Moro’a communities in Nigeria’s central Middle Belt.

The March 14 raids by Fulani herders on Ungwan Gata and two other villages killed at least 149 people, locals and officials said. Fulani leaders said their own people had been attacked previously and had a right to defend themselves.