Denver-area public schools announced they would close on Wednesday after a Florida woman known to be infatuated with the 1999 mass shooting at Columbine High School flew to Colorado and purchased a gun, the AP reports.

The big picture: The FBI considers 18-year-old Sol Pais a credible threat after she "made threats to commit an act of violence in the Denver metropolitan area." The decision to close all Denver-area schools comes just days before the 20th anniversary of the Columbine shooting.

Details: The threat posed by Pais is "credible and general," according to a spokeswoman for the Colorado Department of Public Safety.

  • About 20 schools, including Columbine, were placed on lockdown for three hours on Tuesday before the decision to close Wednesday.
  • The Jefferson County Sheriff's Department said Tuesday that Pais was last seen in the foothills of Jefferson County outside Denver wearing a black T-shirt, camouflage pants and black boots. It noted that she is "considered armed and dangerous."

Go deeper: 2018 was a record year for school gun violence

  • See the full list of school closings here, via CBS Denver.

Go deeper

Updated 47 mins ago - World

At least 50 killed, 3,000 injured after massive explosion rocks Beirut

Photo: Anwar Amro/AFP via Getty Images

A major explosion has slammed central Beirut, Lebanon, damaging buildings as far as several miles away and injuring scores of people.

Driving the news: The cause of the explosion is unknown. Lebanon's health minister said in televised remarks that more than 50 people have been killed and over 3,000 injured.

1 hour ago - Podcasts

The debate over COVID-19 liability protections

Stimulus talks continue to move slowly, with Democrats and Republicans unable to agree on whether or not to include coronavirus-related liability protections for businesses, health facilities and schools.

Axios Re:Cap digs into the debate, which could reset the cost-benefit analysis for businesses thinking about reopening and employees thinking about returning.

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 3 p.m. ET: 18,364,694 — Total deaths: 695,848 — Total recoveries — 10,965,634Map.
  2. U.S.: Total confirmed cases as of 3 p.m. ET: 4,742,277 — Total deaths: 156,133 — Total recoveries: 1,513,446 — Total tests: 57,543,852Map.
  3. States: New York City health commissioner resigns in protest of De Blasio's coronavirus response — New York ER doctor on pandemic advice: "We know what works"
  4. Public health: 59% of Americans support nationwide 2-week stay-at-home order in NPR poll Atrium Health CEO says "virtual hospital" has treated 13,000 COVID patients.
  5. Politics: Republicans push to expand small business loan program Trump tells "Axios on HBO" that pandemic is "under control," despite surges in infections.
  6. Sports: Indy 500 to be held without fansRafael Nadal opts out of U.S. Open.