Associated Press

GOLDEN — The Jefferson County sheriff's office will release 11,000 pages of investigative files today on the attack at Columbine High School after a judge ordered the files be made public.

Excluded from the files are details about the bombs made by gunmen Eric Harris and Dylan Klebold and why some malfunctioned.

Also missing is identifying information about victims, their families, other suspects and persons included in a "hit list" prepared by Harris and Klebold.

Harris and Klebold killed 12 students and a teacher at Columbine before killing themselves on April 20, 1999.

County spokesman John Masson said much of the information has been released previously in reports, videotapes, 911 tapes and ballistics reports, though some information may be new.

"I doubt if there are any real big surprises," he said.

The county is charging $602 for the documents under the Colorado Open Records statutes.