———6 p.m.FBI officials in Colorado say the woman who made undisclosed threats against Columbine High School is "infatuated" with the 1999 school shooting and is considered armed and dangerous. The lockouts come just days before the 20th anniversary of a mass shooting at Columbine High School that killed 12 students and a teacher. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. ————2:55 p.m.Students are leaving classes after tightened security at Columbine High School and over 20 other Denver-area high schools after a lockdown caused by a possible threat. Authorities say tightened security at Columbine High School and about a dozen other Denver-area schools is related to an FBI investigation.

Source: ABC News April 16, 2019 20:35 UTC