Bad enough when one goes up in flames, but it didn't take investigators long to figure out the two cars which 'went up in flames' across the street from each other were likely arson.

Saturday night shortly before 11:30pm, two vehicles (pictured) became engulfed in flames in the 700 block of West Shoshone.

Witnesses called in the fires, crews were quickly able to extinguish them but not before they did a lot of damage.

Police say they're likely arson, and belong to the SAME family. Anyone with any information is asked to anonymously call (509)-545-3510.   No other information about the fires, or possible motive, was released by police.