One person sustained life-threatening injuries in a vehicle-related accident Thursday evening on highway 14 just south of the mile-long bridge. Officials on-scene told KNIA/KRLS News that a female patient was transported by Mercy-One Helicopter to Mercy Medical Center in Des Moines, with an unknown condition. The name of the individual has not yet been released. Knoxville Fire & rescue, Knoxville Township Fire Department, Marion County Sheriffs Deputies and the Iowa State Patrol all responded to the scene, with assistance from the Marion County Dispatch Center. In a completely separate incident about ten-minutes later Thursday night, emergency crews responded to a single-vehicle rollover accident at 1306 Oregon Street just south of town, with one-person refusing to be transported. Both cases remain under investigation. KNIA/KRLS News brings you the most up to date information as it becomes available.