(Missourinet) – An endangered person advisory has been issued for a missing 13-year-old southern Missouri girl.

The Dent County Sheriff’s office says Harley Hopper was last seen early Thursday morning in Salem. She is believed to be traveling with 22-year-old Kenneth Dylan Whitehead in a white older model GMC full size pickup with unknown license plates.

Hopper reportedly left her residence overnight with a backpack, entered the suspect’s vehicle and has not been seen since.

Hopper is described as a white female, age 13, 5’3” tall, weighing approximately 220 lbs., with black hair, blue eyes and a fair complexion. She was seen wearing a blue striped shirt, blue jeans and cowboy boots.

Whitehead is described as a white male, age 22, 5’06” tall, weighing approximately 187 lbs., with brown hair and green eyes. Whitehead could possibly have ties to the Sullivan area or the state of Ohio.

Anyone seeing the missing person, suspect, vehicle, or other important information should immediately call 911 or call the Dent County Sheriff’s Office at 573-729-3757.