Massacres in 1999

On April 20, 1999, twelfth-grade students Eric Harris and Dylan Klebold murdered 13 students and 1 teacher in a school shooting and attempted bombing at Columbine High School in Columbine, Colorado, United States. Twenty people were injured by the gunfire, and three others were injured while trying to escape. The attack ended when Harris and Klebold died by suicide. The Columbine massacre was the deadliest mass shooting at a K–12 school in U.S. history until the Sandy Hook Elementary School shooting in December 2012. It remains among the most infamous massacres in the United States and the deadliest mass shooting in Colorado. As of June 2025, it had inspired more than 70 copycat attacks, a phenomenon dubbed the Columbine effect, and Columbine has become a byword for modern school shootings.

massacre in the Kosovo crisis

mass killings in Kosovo

1999 mass massacre in Ćuška, near Peja, Kosovo, Yugoslavia

1999 massacre of Kosovo Albanians by Serbian police in Suva Reka, Kosovo

1999 massacre during the Kosovo War

1999 mass execution in Meja, Kosovo

mass stabbing and car ramming attack in Shimonoseki, Japan

Kosovo War incident of 25 March 1999

1999 war crime in Yugoslavia

Killing of kosovars

1999 Russian massacre in Chechnya

1999 massacre of Chechen civilians by the Russian Ground Forces

1999 killing of Kosovo Serbs

military attack on the town of Odi, Nigeria

American mass murderer (1955-1999)

1999 massacre in East Timor