Tacoma fire fighters responded to a reported commercial structure fire at approximately 3:45 a.m. Monday morning to find flames and smoke pouring out of a 14,823-square-foot building, formerly a kitchen and bath retail distribution center, located in the 100 block of South 26th Street, according to Tacoma fire spokesperson Joe Meinecke. Crews worked quickly to knock down the flames that started in an exterior doorway alcove, and ventilated the smoke that had built up inside the vacant building. According to Meinecke, the cause of the fire is undetermined, though early indications point to materials used in a homeless type shelter that was set up in the alcove. The fire resulted in an estimated $12,500 damage to the building. There were no injuries to report.