This combination of undated photos released by the Jefferson County, Colo., Sheriff's Office on Tuesday, April 16, 2019 shows Sol Pais. On Tuesday authorities said they are looking pais, suspected of making threats on Columbine High School, just days before the 20th anniversary of a mass shooting that killed 13 people. (Jefferson County Sheriff's Office via AP)
The Associated Press
LITTLETON, Colo. (AP) - Authorities said Tuesday that they are looking for a young woman who is "infatuated" with the 1999 shooting at Columbine High School and made threats just days before the 20th anniversary of the attack that killed 13 people.
The undisclosed threats led Columbine and several other high schools outside Denver to lock their doors for nearly three hours. All students were safe, school officials said.
Sol Pais, 18, flew to Denver from Miami and bought a pump-action shotgun and ammunition, said Dean Phillips, special agent in charge of the FBI in Denver. Pais was last seen in the foothills west of Denver, was considered armed and extremely dangerous and should not be approached.
The FBI's Rocky Mountain Safe Streets Task Force issued a notice Tuesday describing Pais as "infatuated with (the) Columbine school shooting." The alert also said police who come into contact with her should detain her and evaluate her mental health.
Phillips said the threats she made were general, not specific to any school.
"She has made some concerning comments in the past ... and because of that we were concerned," he said.
The Denver Post reported that a call to a phone number listed for Pais' parents in Surfside, Florida, was interrupted by a man who identified himself as an FBI agent and said he was interviewing them.
The Associated Press left messages at two numbers listed for Pais' relatives in Florida, while another number was disconnected.
The doors were locked at Columbine and more than 20 other schools in the Denver area as the sheriff's office said it was investigating threats against schools related to an FBI investigation.
Columbine students continued attending classes in the afternoon and left school on time, but after-school activities were canceled on the campus in Littleton, Colorado.
Teenage gunmen attacked Columbine on April 20, 1999, killing 12 classmates and a teacher.
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Associated Press writer Thomas Peipert in Denver contributed to this report.
A student leaves Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
Students leave Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
Students leave Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
School police officers look on as students leave Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
Columbine High School principal Scott Christy, right, joins an officer in watching as students leave the school late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
An officer from Jefferson County, Colo., Schools listens on his radio as students leave Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
A student leaves by a scooter as parents wait in their vehicles for their children outside Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
A Jefferson County, Colo. Schools officer blocks a driveway with a pylon outside Columbine High School as students leave late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press
Students leave Columbine High School late Tuesday, April 16, 2019, in Littleton, Colo. Following a lockdown at Columbine High School and other Denver area schools, authorities say they are looking for a woman suspected of making threats. (AP Photo/David Zalubowski)
The Associated Press