The Rock County Sheriff's Office is investigating an early morning traffic accident with injuries. Deputies say three people were hurt in the single vehicle crash about 2:00 a.m. on EMH Townline Road near Vicerkman Road in the Town of Milton. Authorities say the vehicle appears to have been headed eastbound when it crossed the centerline, entered the opposite ditch, and hit some trees. A Sheriff's Office news release indicated the driver, 45-year-old Robin S. Marinez of Janesville was critically injured, and arrested on a charge of Operating While Intoxicated Third Offense. Her two passengers were treated and released at Mercy Hospital and Trauma Center.