![]() All incidents listed here involved either teachers, staff, students, minors, or law enforcement. Suicides or suicide attempts where no other individuals were harmed are not included either. College and university shootings are not included. Please note that the incidents included here represent shootings and related firearm incidents that have occurred at a K-12 school in a U.S. The chart below shows the number of school shootings that have occurred in a U.S. 1990-1999: 80 incidents of gun violenceĭeadliest incident: Columbine High School massacre on April 20, 1999, where two students, an 18-year-old and a 17-year-old, killed twelve students and one teacher, before shooting and killing themselves.2000 - 2009: 44 incidents of gun violenceĭeadliest incident: Red Lake High School massacre on March 21, 2005, where a 16-year-old student killed five fellow students, one teacher, and a security guard before killing himself.2010 - 2019: 142 incidents of gun violenceĭeadliest incident: Sandy Hook Elementary School massacre on December 14, 2012, where a 20-year-old man killed 20 children and 6 adults before taking his own life. ![]()
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