February 13, 2012 3:21 PM

Columbine students attacked with hammer at school

A security officer stands guard at the entrance to Columbine High Schoolon April 20, 2009 in Littleton, Colorado. (Marc Piscotty/Getty Images)

LITTLETON, Colo. - A teenage girl accused of attacking two students with a hammer at Columbine High School had warned a school employee of the attack moments before it happened.

Jefferson County School District security director John McDonald says investigators Monday were trying to gather additional details.

McDonald says the 14-year-old suspect targeted a 15-year-old girl in a bathroom. A male student saw the attack developing and was injured while stopping it. McDonald says he could not immediately release details of the injuries.

The Littleton high school was the scene of one of the worst school attacks in U.S. history. Students Eric Harris and Dylan Klebold opened fire on April 20, 1999, killing 12 classmates and a teacher and wounding 26 others before killing themselves in the school's library.

© 2012 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.
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