At 12:42 PM Rancho Cucamonga Firefighters responded to 8953 Citation Ct in references to a residential structure fire prior to arrival crews alerted dispatch they could see heavy smoke coming from the area. Upon arrival, crews began fighting in the defensive mode to keep the fire from spreading. At this time fire officials were warned by the resident that there was ammunition inside the residence near the fire. The crews began working the fire with a ladder truck to get elevation over the fire. Shot by: ROBERT