Saturday’s fire at Bed Mart was human-caused according to Bend Fire & Rescue Battalion Chief Dave Howe. He says firefighters found several mattresses burning on the loading dock at the rear of the business near Highway 20 and Purcell when they arrived around 2:45 p.m. The flames spread up an outside wall. Firefighters were able to stop the flames just before they burned their way to the inside of the structure. Damage is estimated at $20,000. The investigation continues.