(Eugene, OR) -- Two women face arson charges following two seemingly unrelated incidents on the same day in Lane County. A witness reported seeing 29-year-old Shara Brittain running from a house in Veneta after a debris pile caught fire. Investigators say gasoline had been poured inside the house, and the incident appeared intentional. She was arrested at an area business. While that incident was under investigation Friday, a woman was seen lighting grass on fire in Springfield. A witness extinguished the fire and deputies arrested 34-year-old Samantha Weekly, of Eugene.