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UPDATE: Both Harley M. Hopper and Kenneth Dylan Whitehead have been located. Authorities say Ms. Hopper was unharmed.

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DENT COUNTY, MO (KTVI)- The Dent County Sheriff's Office has issued an Endangered Person Advisory for a missing 13-year-old girl. Harley M. Hopper was last seen at 5730 MO-19 in Salem, Missouri about 1:25 a.m. Thursday.

She is a white female, 5'03, 220 lbs with black hair and blue eyes. She was wearing a blue striped shirt, blue jeans and cowboy boots.

Harley is believed to be with 22-year-old Kenneth Dylan Whitehead. He is a white male, 5'06, 187 lbs with brown hair and green eyes.

A witness says the 13-year-old left her residence with a backpack and entered the suspect vehicle, a white older model GMC full size pickup bearing unknown registration.

Police say Whitehead could have ties to the Sullivan area or the state of Ohio.

Anyone seeing the missing person, suspect, associate, or vehicle, or anyone having any information related to the endangered missing person should immediately dial 911 to contact the nearest law enforcement agency.

You can also call the Dent County Sheriff's Office at 573-729-3757.

Harley M. Hopper

Kenneth Dylan Whitehead

Suspect Vehicle