A 65 year-old Pierre man died this weekend in an accident involving an all-terrain vehicle. The man was driving the Suzuki A-T-V north on South Cleveland Street around 4:45 pm Saturday afternoon, when the Suzuki hit a tree in the 900 block of South Cleveland. The driver was taken to Avera Saint Mary’s Hospital in Pierre then flown to a Sioux Falls hospital where he died Sunday. The name of the driver is not being released until family has been notified. The driver was not wearing a helmet. The South Dakota Highway Patrol is investigating the crash. Assisting at the scene were the Pierre Police Department and American Medical Response Ambulance.