At least 22 killed after school building collapses in Nigeria Al Jazeera EnglishFirst a Crack in the Wall, Then His School Collapsed, Killing at Least 22 The New York TimesPlateau school collapse: Children killed and trapped in Nigeria BBC.com21 people die as school building collapses in Nigeria when students were taking exam CNNNigeria: At least 22 students killed after school collapses during morning class The Telegraph