Columbine High School bomb hoax
© KUSA
An anonymous caller who claimed bombs had been planted inside Columbine High School on Thursday morning led to an aggressive police response and a decision to place more than 20 schools in the Jefferson County area on "lockout" status.

No evidence of explosives or any other threat was found following a search of Columbine, officials said. Three hours after the threat was called in, Jefferson County Public Schools announced that all lockouts had been lifted except the one at Columbine, which would remain in place the rest of the school day.


"The kids are safe. The staff is safe," Jefferson County sheriff's spokesman Mike Taplin said. "A controlled release (of students) is planned for end of the day."

Jefferson County sheriff's officials said the threat that "multiple explosives" had been planted inside Columbine - site of the horrific 1999 massacre - came in around 9:20 a.m.

"The person claimed to be hiding outside with a gun," Taplin said. "The perimeter was searched and secured. The school was placed on lockout. So far we have not found anything to validate the threats that have been made."

As a precaution, all schools in the Columbine, Chatfield and Dakota areas were placed on lockout, which means all students are held inside the building and entry is restricted, according to a tweet from the Jefferson County School District.

First responders established a command post in a parking lot in Clement Park, near the corner of South Pierce Street and West Bowles Avenue.

Officials could not say exactly how many people responded to the threat, but agencies involved in the response included the Jefferson County Sheriff's Office, JeffCo R1 Security, a school district security agency, Littleton Fire Rescue, Colorado Parks and Wildlife and the Morrison Police Department.

The Jefferson County Sheriff's Office in a tweet asked parents to stay away from Columbine during the lockout and assured them that their students were safe. Students were released at 2:45 p.m.

"Unfortunately, we receive many threats like this to Columbine and we respond to each threat appropriately, which is what we're doing now," Taplin said.

The response was appropriate because the person who logged the threat claimed to be lying in wait with a gun outside, Taplin said.