Sandy Hook skoleskydning og historiske massakrer i USA

Connecticut school shooting: America's worst school shootings

At least 27 people have been killed in a mass shooting at an elementary school in the United States. Here are the ten worst school and university shootings in the US:

Connecticut State Police lead children from the Sandy Hook Elementary School immediately after the shooting Photo: AP Photo/Newtown Bee, Shannon Hick

6:33PM GMT 14 Dec 2012

Aug 1, 1966: Charles Whitman, 25, a student and former Marine, killed his wife and mother before carrying a rifle to the tower on the campus of the University of Texas in Austin. In a 96-minute rampage he fatally shot 14 others before police shot and killed him.

July 12, 1976: Edward Charles Allaway, 37, a custodian at California State University Fullerton killed seven people in the library with a gun purchased at Kmart. He was found not guilty by reason of

Jan. 17, 1989: Patrick Edward Purdy, a 24-year-old drifter, opened fire with a semi-automatic rifle in Stockton, California playground, killing five children and wounding one teacher and 29 other children. He killed himself.

Dec 1, 1997: 14-year-old Michael Carneal fires on students attending a prayer circle at a school in West Paducah, Kentucky. He kills three students and wounds five.