Eric David Harris (April 9, 1981 – April 20, 1999) and Dylan Bennet Klebold (September 11, 1981 – April 20, 1999) were the two American high school seniors who committed the Columbine High School massacre. The pair killed 13 people and injured 24 others, three of whom were injured as they escaped the attack. The two then committed suicide in the library, where they had killed 10 of their victims.