New Delhi, July 22 -- The Everett McKinley Dirksen United States Courthouse in downtown Chicago was placed on lockdown Tuesday morning after reports emerged of a knife-wielding individual inside the building. The Federal Bureau of Investigation (FBI) has launched an investigation into the incident.

According to reports, the lockdown began around 11:00 a.m. at 219 South Dearborn Street. Witnesses said a person with a knife was seen in the public area of the courthouse lobby, prompting a swift response from law enforcement. A speaker announcement reportedly alerted those inside the building as the situation unfolded.

Images from the scene showed officers from multiple agencies surrounding the courthouse. Police were also seen searching a ...