Update 6/16/17: Two women who were reported missing from Knox County posted a video on YouTube saying they left voluntarily and are safe.

Heather Duncan, 23, was reported missing on May 24 to the Knox County Sheriff's Office. A few days later, Anna Leigh Settle, 23, was reported missing to the Knoxville Police Department.

On Friday, KCSO said investigators are closing the case unless new information surfaces.

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UPDATE 6/9/17: The Knoxville Police Department has asked for help locating another missing woman. Anna Leigh Settle, 23, is believed to be with Heather Duncan, 23, who was last seen May 24.

Settle was last in contact with friends in the Knoxville area about 3 weeks ago, according to Knoxville Police.

Investigators believe Settle is with her boyfriend, Bryan Henderson and her friend, Heather Duncan.

Settle’s family members believe she was possibly seen at a KOC Campground in Strasburg, Colorado on May 24, 2017.

It is also possible Settle may be in the area of Vallejo, California.

According to the Knoxville Police Department, Settle’s cell phone is no longer active and some of her personal belongings were left behind at her residence.

Settle is a white female, 5’ 10” tall, and 115 pounds with brown, shoulder length, straight hair, and brown eyes. Settle has a tattoo of a small skeleton key on the mid-portion of her back.

Anyone with information on Anna Leigh Settle is asked to contact the Knoxville Police Department’s crime information line at 865-215-7212. Callers can remain anonymous.

Anyone with information on Heather Duncan is asked to contact the Knox County Sheriff’s Office Major Crimes Unit at (865) 215-2243.

ORIGINAL STORY: The Knox County Sheriff’s Office is searching for a missing Knoxville woman.

Heather Duncan, 23, last spoke with her family on May 24, when she told her father she would be leaving with friends to go to West Knox County. The family believes that she was last seen at a KOA Campground in Strasburg, Colorado on May 24th.

Duncan is a white female with a thin build, 5’8”, and 104 pounds with dark brown, shoulder-length, naturally wavy hair. She has piercings in her ears, nose, and navel. Duncan also has several tattoos, including a rose/clock quarter sleeve on her right arm, “Enlightenment” on her left inner arm, an owl on her left wrist, a stick figure girl on her outer left arm, a large flower on her torso, and a dream catcher on her back left shoulder.

She wears dark-rimmed glasses and drives a red 2014 Nissan Versa Sedan with TN license plate N8832F.

Anyone with information is asked to contact the Knox County Sheriff’s Office Major Crimes Unit at (865) 215-2243.