went off, either before or after the shooting started so the students scrambled to get out of the school. once people realized what was happening, teachers and staff began yelling to run. we know that out of the at least eight who died, it's unclear how many are students. how many are adults. teachers, if there are any police officers involved. we just know it's a devastating loss. >> it is. the thing is we talk about this. the explosive devices placed as the sheriff says both on the campus and off the campus. it takes us back to columbine because in the days of columbine, that was supposed to be an explosive event, right? they had the propane bombs planted inside the school. they had other bombs planted in the cars. that was the initial thing. this is a good indication experts say there might have been help for we talk about klebold being involved in that. when you have explosives now the first thing that