Lockout lifted at Columbine High School and other nearby schools following a telephone threat

JEFFERSON COUNTY, Colo. - A lockout has been lifted at Columbine High School and other nearby schools, following a telephone threat on Thursday morning, the Jefferson County Sheriff's Office tweeted at 2:14 p.m.

The district reports that students and staff remained safe inside after the threatening call came in during the morning.

"Columbine area schools are currently in lockout. All students and staff are safe.Police r n process of investigating threat at ColumbineHigh," @JeffCOSchoolsCO tweeted at 10:12 a.m.

Schools on lockout include: Columbine Hills, Dutch Creek, Governor's Ranch, Leawood, Normandy Elementaries, KenCarylMiddle and Columbine High.

Sheriff's Office spokesman Mark Techmeyer said deputies are in the area of the schools as a precaution. He also explained that the "lockout" procedure allows classes to continue inside the building but locks the perimeter.