Local leaders in Nigeria’s northeast say there have been reports of gunmen crossing into Cameroon and Chad with some of the more than 200 schoolgirls kidnapped two weeks ago. Nigerian author Adaobi Tricia Nwaubani says the tragedy is uniting Nigerians of diverse ethnicities and religions.Local leaders in Nigeria’s northeast say there have been reports of gunmen crossing into Cameroon and Chad with some of the more than 200 schoolgirls kidnapped two weeks ago. Nigerian author Adaobi Tricia Nwaubani says the tragedy is uniting Nigerians of diverse ethnicities and religions.