This month alone, at least four shootings of students have occurred in schools across the country, including Monday's deadly attack outside Cleveland, Ohio.
Experts say the spate of shootings may be coincidental and not indicative of a troubling trend. They note that, overall, crime and violence in America's schools have been declining in recent years. And murders are particularly uncommon.
A teenager opened fire as students ate breakfast in the cafeteria at his suburban Cleveland high school Monday, killing one student and wounding four others before he was chased from the building by a teacher. The suspect, whose name was not released because he is a juvenile, was arrested near his car a half-mile away, authorities said.