A two vehicle crash west of Millsboro on Tuesday morning remains under investigation. Delaware State Police say a Jeep driven by a 32 year old Salisbury man was eastbound on Cross Keys Road and failed to stop for a posted stop sign at Phillips Hill Road and collided with a pickup truck. The driver of the Jeep was not wearing a seat belt and was taken to Christiana Medical Center with critical injuries. The driver of the pickup was restrained and treated for minor injuries. Charges have not yet been filed.