A 20-year-old soldier stationed at Fort Hood, Texas, is missing, and Army investigators are reaching out to the public for help finding her.

Pfc Vanessa Guillen was last seen wearing a black T-shirt early Wednesday afternoon in the parking lot of her Regimental Engineer Squadron Headquarters, 3rd Cavalry Regiment. Her car keys, barracks room key, identification card and wallet were found in the armory room where she was working, Fort Hood said.

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Mayra Guillen, the soldier’s sister, posted on Facebook that her sister’s phone was last pinged near Belton, about 20 miles east of the Army post. “Something is not right,” she wrote, “please help me find her.”

The Army said Guillen is of Hispanic descent, 5 feet 2 inches, and weighs 126 pounds with black hair and brown eyes. She has three tattoos: a cross with a flower and a flower, both on her left arm, and a mountain on her upper left shoulder. She also has a mole on the left side of her chin.

Anyone with information should contact Army CID Special Agents at 254-495-7767 or the Military Police Desk at 254-287-4001.

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[Featured image: Vanessa Guillen/Fort Hood Military Police]