Crews are battling a brush fire in Tooele County on an estimated 600 acres Sunday. The Great Basin Coordination Center says as of Sunday evening the Timpie Springs Fire is burning on 600 acres. According to the North Tooele County Fire District, the fire began around noon near State Highway 196 near mile marker 34, several miles west of Grantsville. A public information officer for the fire district said they believe the blaze was sparked by target shooters. Firefighters from the North Tooele Fire District, the state of Utah and the BLM are working to extinguish the blaze.