A fire on Saturday destroyed a box truck owned by a plumbing company that was parked at a Vancouver Costco store.Vancouver firefighters were dispatched around 5:30 p.m. to 6720 N.E. 84th Street for the report of a vehicle fire.Customers going to and from the store called 911 when they noticed the truck had caught fire and flames were spreading. The driver of the truck was inside the store, said fire department spokesman Kevin Stromberg.The first engine arrived in minutes. Along with the crew of a fire truck, seven firefighters extinguished the blaze in less than 10 minutes, Stromberg said.Still, that was long enough for the fire to destroy the truck and its contents.No one was hurt as a result of the fire. No other vehicles near the truck were reportedly damaged.The Vancouver Fire Marshal is investigating the cause.