Two people were killed in a one vehicle alcohol-related crash on Highway 151 in Fond du Lac County. The crash happened shortly before 2:30am Saturday on Highway 151 near County Highway WH. A preliminary investigation indicates a northbound vehicle on 151 left the road and struck a tree. A 41 year old Fond du Lac man and 34 year old Fond du Lac woman were pronounced dead at the scene. A 37 year old Fond du Lac man was transported to St. Agnes Hospital with serious injuries. Investigators say speed and alcohol were factors. The crash remains under investigation.