The morning after, motives for the killing are also coming into clearer focus. The dead gunmen, identified by fellow students as seniors Dylan Klebold and Eric Harris, made clear their hatred of minorities and particularly jocks throughout the killing rampage. Students said Klebold and Harris were fascinated with World War II and the Nazis and noted that Tuesday was Adolf Hitler's birthday.

Sheriff John Stone described the apparent motives as "frantic lunacism, with right wing beliefs, perhaps."

Students said the gunmen repeatedly denounced jocks, and at one point ordered all jocks to stand up to be killed. They also targeted an African American student and called him a "nigger" just before gunning him down. One student reported that members of the "Trench Coat Mafia" made a film depicting a mass execution of jocks and recently showed it at the school.

Sheriff Stone said more than 30 explosive devices have been found, within the school, in the suspects' cars and around the area, including one at a nearby intersection. Among them were a wide variety of sophisticated devices, including pipe bombs, incendiary bombs and propane-powered nail bombs with timers. The devices continue to challenge bomb squads, who accidentally detonated one of the devices around 11 p.m. Tuesday night. The squad is still at work Wednesday morning, and all county schools have been closed, as well as several in Denver and surrounding communities.

Stone said he was "shocked" that such an elaborate crime could have been pulled off by high school students. "This was very well planned," he said. "This wasn't something they just planned to get up in the morning and do." Authorities are currently investigating other suspects and expect to charge additional conspirators in the crime.

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