A suspicious fire is under investigating after erupting Friday morning. Yakima County Fire District #5 say the fire sparked on the 400-block of Hickory Road, just outside of Grandview. Fire crews say it was a double-wide manufactured home that was up in flames, they say it had been vacant for a few years. Due to the amount of fire when crews arrived, they let the fire continue to burn. Fire Officials say crews protected nearby exposures and contained the fire to the footprint of the home. The Yakima County Sherriff's Office has been notified of the suspicious fire according to firefighters.