Police in the southern Minnesota city of Waseca say they prevented an "unimaginable tragedy" by foiling a teenager's plot to bomb its junior and senior high school.
Police arrested 17-year-old suspect John David LaDue Tuesday and charged him Thursday with attempted murder and possessing explosive devices.
The Free Press of Mankato reports that Waseca police believe the youth was acting alone. Police Captain Kris Markeson says he believes the teen would have succeeded if he had not been caught.
A visibly shaken Markeson said he was disturbed by the amount of guns and other material the youth obtained. He said he can't divulge if specific students were targeted.
The charges say the boy told police he intended to kill "as many students as he could."
The investigation began after three small explosive devices were discovered at a playground in late March.