Included in its list of perpetrators are Islamist militant groups like Boko Haram but also Fulani herders. The Fulanis are a mainly Muslim ethnic group who live across West Africa and have traditionally earned their living by raising cattle and sheep.
The inclusion of the Fulani herders, who InterSociety describes as "jihadists" in all its reports, however, is the source of some controversy in Nigeria over how these killings should be categorised.
While the herders tend to be Muslim, many researchers in this field reject the description of this as a religious conflict, saying it is often about access to land and water.
Fulani herders have come into conflict with both Muslim and Christian communities across Nigeria.
Security analyst Mr Ani argues that "to say that they are jihadists - it's a far stretch. It has nothing to do with that. It has a lot more to do with rogue and criminal elements."
Confidence McHarry, a senior security analyst at Africa-focussed consultancy SBM Intelligence, says the clashes are often due to ethnic tensions and competition over resources.
"It might be ethnic in nature - they're seeking to grab lands, they're seeking to expand territory, but the more they displace communities and the more they attack worship centres, the more these things tend to get looked at in that light."
InterSociety also mention what are known in Nigeria as bandits, saying they are mostly ethnic Fulanis in the north-west of the country, who are involved in kidnapping and have a track record of killing both Christians and Muslims.


