The FBI's Rocky Mountain Safe Streets Task Force issued a notice Tuesday, saying police who come into contact with the woman should detain her and evaluate her mental health.
On Tuesday, an Federal Bureau of Investigation bulletin said authorities lacked probable cause for a formal arrest but that law enforcement should detain Pais for a mental-health evaluation.
"She can, please, come home".
Pais is a student at Miami Beach Senior High School, said Daisy Gonzalez-Diego, spokeswoman for Miami-Dade County Public Schools. The FBI was interviewing the family and neighbors on Tuesday. "More information to follow shortly".
Security alerts and safety drills have become commonplace in public schools across the United States of America since the Columbine shooting as campus gun violence has grown more frequent.
Authorities say she is a threat to herself and the community. He said he was "baffled" to learn she was the person authorities in Colorado were searching for. "Superintendents from school districts across the Denver-metro area gathered for a call Tuesday night and collectively determined that the safest course of action will be to close schools Wednesday, April 17", a statement read. The school district in Jefferson County, which enrolls 86,000 students, pointed to the "ongoing safety concern", instructing all students and staff to stay home for the day.
In this April, 20, 1999, file photo, a woman embraces her daughter after they were reunited following a shooting at Columbine High School in Littleton, Colo.
The Jefferson County Sherriff's Office today confirmed an 18-year-old woman named Sol Pais travelled to Colorado and made threats that sparked the lockdown.
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The only reason to not meet with them would be if you knew you were going substantially higher. Keim said watching the speculation abound has been "fun" and "exciting".
Denver area schools are closed Wednesday as authorities search for her.
They didn't say where she traveled from.
"People relate to them because they view Columbine as a case of the oppressed students rising up against their oppressors, the bullies", said Peter Langman, an expert on the 1999 attack and other school shootings.
Some schools released their students after additional security was called in and canceled evening activities or moved them inside.
The students walked to crosswalks and buses parked near the entrance.
Officials said after school activities will be held at all schools except Columbine, but didn't explain why.
Jefferson County Sheriff's Department tweeted about the lockdown mid-afternoon Tuesday.
Jefferson County school officials said events planned to mark the anniversary this weekend will go on as scheduled, including a ceremony at Columbine on Saturday. She made "credible" - but not specific - threats after traveling from Miami to Denver on Monday night, said Dean Phillips, the special agent in charge of the Denver FBI office.