Fire officials are trying to determine the cause of two brush fires. There were two fires in the area Saturday, one near Red Rock Road, and one in Smith Valley. Officials say the cause of the fire on Red Rock Road was from high winds and power lines while the cause for Smith Valley is still under investigation. Both fires come after the Piper fire Friday that burned more than 300 acres north of Silver Springs. Officials say that fire may have been started by a firearm-related event. The first major fire of the season, the Chaves fire, was sparked by target shooters.