The Lake Forest Fire Department was dispatched at 4:55 PM on Tuesday night for a report of a burning odor inside the BMO Harris Bank, 824 North Western Ave in Lake Forest. Engine 421 and Battalion 42 were due.

While en route, dispatch advised that the caller advised there was a burning odor inside the bank for around 10 minutes. The caller also advised they could not see any smoke or fire. 
Battalion 42 was on scene and advised it was a two story structure with nothing showing. They switched to Fireground Red upon arrival.

Update: Battalion 42 advised both units are in service and returning