Police are searching for an Oregon mother and her 3-year-old son who haven't been seen or heard from in days.

Karissa Alyn Fretwell, 25, and her 3-year-old son William "Billy" Fretwell were reported missing on May 17, according to the Salem Police Department. The pair was last in contact with relatives on May 13.

Karissa is a white female who stands at about 5 feet 9 inches tall and weighs approximately 135 pounds, according to police. She has blue eyes and naturally blond hair that is dyed red. Her Facebook page says she lives in McMinnville, Ore., but she originally hails from North Dakota.

Billy is a white male who is about 3 feet tall and weighs approximately 30 pounds. He has blond hair and blue eyes.

Anyone with information about the case should call the Salem Police Tips Hotline at (503) 588-8477.