Four people were injured, one seriously in a two vehicle crash in Fond du Lac County. The crash happened shortly before 7am Friday on Highway 23 at Streblow Drive. A preliminary investigation showed that a passenger car was stopped at the stop sign on Streblow Dr when it pulled out into the path of a westbound passenger car on State Highway 23. The driver of the car that was turning onto Highway 23, a 29 year old Fond du Lac man, was flown by helicopter to ThedaCare Regional Medical Center in Neenah with serious injuries. The driver and two passengers in the westbound vehicle, all from North Fond du Lac, were transported to St. Agnes Hospital in Fond du Lac with minor injuries. Both operators and the two passengers in the westbound vehicle were wearing their seat belts. The driver of the car that was turning onto STH 23 was cited for failure to yield right of way from a stop sign.