All clear given after threat at Columbine High School prompts multiple lockouts
JEFFERSON COUNTY, Colo. -- 23 Jefferson County Public Schools were placed on lockout Thursday morning after a reported threat at Columbine High School, the Jefferson County Sheriff's Office said. The sheriff's office said that the threat came around 9:20 a.m. claiming that there were explosive devices inside the school. The caller claimed to be hiding outside with a gun.
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