This study investigated the prevalence of suicidal ideation & behaviours in victims, perpetrators, & victim-perpetrators of school bullying & compared them with a group of students who were in the same schools & were not involved with bullying. 1718 7th- & 8th grade students in 2 middle schools participated in October 2000 in a cross-sectional study. Compared with students who were not involved with school bullying, victim-perpetrators reported more suicidal/self-injurious behaviours & suicidal ideation in the previous 6 months. In female, but not male, students, all 3 school bullying groups had increased suicidal ideation for the previous 2 weeks. Students who are involved in school bullying should be the targets for suicide monitoring & prevention programs. (32 refs.)