Authorities were on the scene this afternoon in the North Side's Uptown neighborhood removing weapons from the apartment of a 60-year-old man who made a threat against the Willis Tower, Chicago police said.
Police and other law enforcement officers arrived in the 4200 block of North Sheridan Road at about 2:30 p.m. in response to the threat, said Chicago Police Officer Dan O'Brien.
Investigators do not believe there was a credible threat to the Willis or to the public.
The man's apartment was searched and police recovered multiple guns and gunpowder, he said. The building was evacuated and no injuries were reported.
O'Brien said the man was taken into custody and will undergo a mental evaluation. The nature of the man's alleged threat on the Willis Tower was not immediately known.