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School officials alerted students about an active threat just before 11 p.m.

Students were told to shelter in place until an all-clear was issued within an hour of the first alert.

Feb 26, 2024 (01:45)

Chicago forecast: Beautiful fall weather through the weekend

Chicago forecast: Beautiful fall weather through the weekend

Meet one of the carpenters who helped build the Obama Presidential Center

Meet one of the carpenters who helped build the Obama Presidential Center

Experts urge vaccinations as fall flu season gets an early start

Experts urge vaccinations as fall flu season gets an early start

Companies, governments race hackers to patch internet security flaws

Companies, governments race hackers to patch internet security flaws

Earthquake kills 16, injures dozens in Tibet

Earthquake kills 16, injures dozens in Tibet

All CTA elevated trains to shut down in the Chicago Loop this weekend for maintenance

All CTA elevated trains to shut down in the Chicago Loop this weekend for maintenance

Full interview with Juliana Stratton, Illinois Democratic candidate for U.S. Senate

Full interview with Juliana Stratton, Illinois Democratic candidate for U.S. Senate

Full interview with Don Tracy, Illinois Republican candidate for U.S. Senate

Full interview with Don Tracy, Illinois Republican candidate for U.S. Senate

U.S. Senate race spotlight: Juliana Stratton vs. Don Tracy in Illinois

U.S. Senate race spotlight: Juliana Stratton vs. Don Tracy in Illinois

How Chicago alders decide how to spend their $1.5M ward budget

How Chicago alders decide how to spend their $1.5M ward budget

Sam Chatman, DJ and father of "Steppin'," dies at age 85

Sam Chatman, DJ and father of "Steppin'," dies at age 85

No charges in deadly Mundelein police shooting

No charges in deadly Mundelein police shooting

Chicago weather: Clear, cool Thursday night

Chicago weather: Clear, cool Thursday night

Where does the race for Chicago mayor stand? Analysts weigh Brandon Johnson's re-election chances.

Where does the race for Chicago mayor stand? Analysts weigh Brandon Johnson's re-election chances.

Hyundai expansion will bring thousands of new jobs to Joliet area

Hyundai expansion will bring thousands of new jobs to Joliet area

"Looksmaxxing" influencer Clavicular pleads not guilty to rape

"Looksmaxxing" influencer Clavicular pleads not guilty to rape

Trump administration seeks to win support from farmers hit by high diesel costs

Trump administration seeks to win support from farmers hit by high diesel costs

CTA will shut down all elevated Loop trains this weekend

CTA will shut down all elevated Loop trains this weekend

Bears giving away fake Mike Ditka mustaches at Soldier Field vs. Patriots to honor late coach

Bears giving away fake Mike Ditka mustaches at Soldier Field vs. Patriots to honor late coach

Woman critically hurt in possible road rage shooting in Brighton Park

Woman critically hurt in possible road rage shooting in Brighton Park

Trending cooler next week in Chicago

Trending cooler next week in Chicago

Virginia state senator faces federal bribery and racketeering charges

Virginia state senator faces federal bribery and racketeering charges

Chicago Mayor Brandon Johnson hosts budget town hall

Chicago Mayor Brandon Johnson hosts budget town hall

MK Pritzker donates $500K to Amy Acton's Ohio governor campaign after Ramaswamy attack ads

MK Pritzker donates $500K to Amy Acton's Ohio governor campaign after Ramaswamy attack ads

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