This "Borno State" is the one that seems to troubled and this attack does appear as a Muslim attack on a Muslim governor. The state is in the Northeast corner, geographically, this seems to be break down into being the more Muslim North. 40 people killed, major attack.
Unfortunately, Christians may have been ethnically cleansed from some of these areas.
Islamic State says attacked Nigerian governor's convoyMAIDUGURI, Nigeria (Reuters) - Islamic State claimed responsibility on Wednesday for an attack on the convoy of a state governor who was headed to a rally in northeastern Nigeria ahead of Saturday’s presidential election.
The group said in a statement on its Amaq news agency that 42 people were killed in Tuesday’s attack on Borno state’s governor. Official sources told Reuters earlier on Wednesday between three and 10 people were killed, and that some of them may have been beheaded.
Boko Haram has waged a decade-long insurgency in Nigeria’s northeast which has killed around 30,000 people and forced about 2 million to leave their homes. Islamic State West Africa Province, which split from Boko Haram in 2016, has carried out a series of attack on military targets in the last few months.
Read more at: https://www.reuters.com/article/us-nigeria-election-security/islamic-state-says-attacked-nigerian-governors-convoy-idUSKCN1Q22S8
Nigeria has presidential elections about on Sunday, around then. Feb. 16th.