Some recent shootings at U.S. schools:
Dec. 1, 1997 - A youth opens fire on a student prayer circle in a hallway at Heath High School in West Paducah, Ky. Three students are killed and five others wounded. A 14-year-old student, described as emotionally immature, is arrested.
Oct. 1, 1997 - A 16-year-old outcast in Pearl, Miss., is accused of killing his mother, then going to school and shooting nine students. Two of them died, including the boy’s ex-girlfriend. Authorities later accuse six friends of conspiracy, saying the suspects were part of a group that dabbled in Satanism.
Feb. 19, 1997 - A 16-year-old student opens fire with a shotgun in a common area at the Bethel, Alaska, high school. Killed are school principal Ron Edwards and classmate Josh Palacious. Two other students are wounded. Authorities later accuse two other students of knowing the shootings would take place. Evan Ramsey was sentenced to two 99-year terms last month.
Feb. 2, 1996 - A 14-year-old student turned an assault rifle on his algebra class, killing two classmates and a teacher, in the central Washington city of Moses Lake. Barry Loukaitis was sentenced to two mandatory life terms for the attack at Frontier Junior High School.
Jan. 18, 1993 - Scott Pennington, 17, walked into Deanna McDavid’s seventh-period English class at East Carter High School in Grayson, Ky., and shot her in the head. He then shot janitor Marvin Hicks in the abdomen. Pennington was sentenced to life without parole for 25 years.
May 1, 1992 - Eric Houston, 20, killed four people and wounded 10 in an armed siege at his former high school in Olivehust, Calif. Prosecutors said the attack was in retribution for a failing grade. Houston was convicted and was given a death sentence.