An improperly discarded cigarette has been determined to be the cause of a fire that damaged an Ottumwa bar.  On Wednesday afternoon (3/31), Ottumwa firefighters were called to a fire at Uncle Bucks Bar and Grill at 518 Church Street.  The fire department’s quick response helped minimize damage to the building.  The Ottumwa Fire Department says a discarded cigarette in a bed of mulch near the back door caused the fire.  The Ottumwa Fire Department reminds businesses to have a proper cigarette disposal receptacle on site.