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 ...

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 ...

Experts are praising efforts of officers to bring the Tuesday barricade situation at the Dirksen Federal Building to an end ...

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

The Dirksen Federal Building in Chicago was locked down after reports of a knife-wielding person inside. FBI is investigating ...

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 ...

The Dirksen Federal Building in downtown Chicago is on lockdown, the FBI said.