CBS News Chicago witnessed the man being tackled by law enforcement and removed from the courthouse lobby on a stretcher.

CHICAGO (WLS) -- A standoff at the Dirksen Federal Building downtown Chicago ended after roughly nine hours Tuesday night.

The Dirksen Federal Building in downtown Chicago was on lockdown Tuesday morning, according to the Federal Bureau of ...

The Dirksen Federal Building and its surrounding streets are back open Wednesday morning after a knife-wielding man entered ...

The FBI and other law enforcement personnel responded to a man in the Dirksen lobby who walked into the courthouse armed with ...

Following a nine-hour standoff at the Dirksen Federal Building, a knife-wielding man — who prompted a lockdown and evacuation ...

Following a nearly nine-hour lockdown for a man armed with a knife at one of the most secure federal facilities in Chicago, ...

Chicago’s Dirksen Federal Courthouse was placed on lockdown Tuesday morning after reports of a knife-wielding person inside ...

A person who entered Chicago’s federal courthouse with a knife was taken to the hospital Tuesday night after a standoff with ...

A 38-year-old man is facing a felony charge after allegedly threatening to harm himself with a knife during a lengthy ...

The building was placed on lockdown shortly after 11 a.m., the FBI confirmed. The U.S. Marshals said a man armed with a knife ...

According to the Seattle Police Department, a woman walked into the building pointing a gun at her chest "for unknown reasons" just after 3 p.m. on June 12.