WARDEN, Wash. — Authorities say a bomb destroyed a car parked at a Grant County food plant Saturday night. Grant County Emergency Management spokesman Kyle Foreman says no injuries were reported. A security guard reported a car had exploded in the employee parking lot of Lamb Weston/BSW, a frozen potato supplier located in Warden. Investigators found an improvised explosive device planted inside the car. Foreman says it’s unclear who planted the device, or why the vehicle or the vehicle’s owner was targeted. No other vehicles or structures were damaged. Warden Police, U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives and the Grant County Sheriff’s Office are investigating.