ELLENSBURG, Wash -- Firefighters say they now know what caused the fire at the Darigold building in Ellensburg.
Investigators believe a portable space heater -- left on a couch -- caused the fire. They aren't sure whether it malfunctioned -- so it will now be sent to a lab.
Tuesday's fire destroyed the historic building and several businesses that called it home. Some of those business owners did not have insurance.