(Vancouver, WA)  --  Fire officials say improperly discarded smoking materials are to blame for a blaze that killed one person at a former motel being used as a COVID-19 quarantine site in Vancouver, Washington.  Vancouver Fire Marshal Heidi Scarpelli tells The Columbian Saturday's fire at the former Motel 6 in east Vancouver was confined to the ground floor unit in which it started.  She adds there's no evidence that the fire was intentionally set, but that it was preventable.  A 32-year-old man was killed in the fire.  A second person inside the unit was not injured.