The present study explores how officials in Swedish secondary schools define and categorize situations in which students have been exposed to violence in the school. The study is designed as a case study of two secondary schools, situated in two demographically different urban neighbourhoods. The results indicate that different socio-economic conditions influence how professionals categorize and explain violence, but also what strategies are used to deal with different incidents. In the socially disadvantaged area, there is closer collaboration with the police, and filing police reports is more common. In the school located in a middle-class area, professionals handle similar situations by collaborating with parents and using diagnoses as the main explanation for students' problematic behaviour.