PROSSER, Wash.- Firefighters say the fire that burned hundreds of acres near Prosser Sunday night may have been intentionally set.
Firefighters are certain it was human-caused. They're just unsure whether it was purposely set.
A witness says he saw two men running from the area just after the first smoke appeared.
No word on the exact size of the fire.
Crews remain on the scene tonight on the lookout for hotspots.