There was a three vehicle crash on 175, near Buckman Drive, east of Hopland Friday night that left seven injured, including two with major injuries, one of whom is a child. The number of injured prompted authorities to declare a mass casualty incident. The crash was reported just before 7 pm. Three ground ambulances and two air ambulances were requested to transport the injured. Highway 175 was closed for some time while tow trucks cleared three vehicles from the roadway.