(Hillsboro, OR) -- An investigation is ongoing into a crash that seriously injured a bicyclist in Hillsboro. Police say the crash happened last night at Northeast Cornell Road and 28th Avenue. Police say the driver struck a 53-year-old bicyclist while turning onto Cornell and then left the scene. The driver then returned to the scene and is cooperating with investigators. The bicyclist was airlifted to a hospital with serious injuries.