The investigation is underway into what caused a fatal fire early Friday morning in the town of Klickitat. Klickitat County Sheriff’s Office Chief Criminal Deputy Mike Kallio says one person was killed in the house fire. That person’s identity has not yet been released. The fire occurred in the 300 block of Main Street in Klickitat at around 2 a.m. Friday. Crews from a number of departments in Klickitat County assisted Fire District 3 crews in battling the blaze. Kallio says an investigation into the origin of the fire has begun.