The past 10 years, the U.S. school shootings continued, which mainly include :

April 20, 1999 , two students gunmen attacked Columbine High School in Colorado , after killing 12 students and a teacher committed suicide.

March 21, 2005 , a Minnesota Indian reservation , a 16- year-old student killed his grandparents and then broke into a local high school campus , shot and killed seven people and wounded 15 people, then committed suicide.

November 8, 2005 , Campbell County, Tennessee School massacre occurred on campus , a 14 -year-old high school students shot and killed an assistant principal , principal and assistant principal , another was seriously injured .

August 24, 2006 , Chittenden County, Vermont shooting occurred in a primary school , a gunman killed two people inside and outside the school , shot and wounded three people after self-injury , was finally arrested by the police .

October 2, 2006 , shootings occurred in Lancaster County, Pennsylvania, a community school , killing five girls were killed and the murderer commit suicide .

April 16, 2007 , Virginia Tech University in U.S. history occurred in the worst shooting incident , a Korean student on campus assailants shot at and killed 32 people , wounded people before committing suicide .

February 14, 2008 , a man opened fire on the crowd in the United States Northern Illinois University lecture hall , killing five people and injuring 18 people. Killer then committed suicide.

April 10, 2009 , shootings occurred in the western suburbs of Detroit, Michigan campus • Henry Ford Community College , resulting in two deaths.

December 8, 2011 , the Virginia Tech shootings occurred , resulting in two deaths.

April 2, 2012 , Oakland, California, a university shooting incident , seven people were killed and many wounded .

April 11, 2012 , near the southern suburbs of Southern California campus in Los Angeles , two Chinese students shot dead in the car .