8-15-12 (Danbury, WI) -- The search continues just across the east-central Minnesota border for a missing three-year-old girl from Danbury, Wisconsin -- and a Minnesota State Patrol helicopter and K-9 unit have joined in the effort. Renna Williams was last seen around seven Tuesday night at her home. She has blonde hair, green eyes and was wearing jean shorts and a long sleeve purple shirt. She was not wearing shoes at the time. In addition to the air search, a ground search is also under way. Anyone with information should contact the Burnett County Wisconsin Sheriff's office.