KIMA.COM, YAKIMA, WA - Yakima firefighters responded early Wednesday to the 1100 block of Willow Street to a building on fire. The currently under-construction triplex was burning after an exterior fire had moved inside the single-story building. The fire caused an estimated $50,000 in damage. YFD says the fire may have been set intentionally and and the cause is under investigation. A total of 29 firefighters responded. No injuries were reported. Anyone with information about the fire is asked to call YFD at 575-6060.