The section of Chicago Ave from Pulaski to Kostner has been temporarily closed.
There have been reports of an individual on a roof displaying a flamethrower, propane tanks, and various flags, including a Nazi flag and an upside-down American flag.
Officers and detectives are currently on scene conducting an investigation.
Police ask public to please stay out of the area.
This is a developing story that will be updated when more information is available.
Chicago Ave closed from Pulaski to Kostner due to police activity