The San Juan police department is working to find 17-year-old Arranza Diaz Larraga.
An Amber Alert describes Arranza as 5 feet tall and 115 pounds with blonde highlights, brown eyes and a mole on the inner side of her left knee.
She was last seen at 6:41 p.m. Tuesday, Oct. 13, in the 2100 block of North Cesar Chavez Rd. in San Juan.
Authorities believe Arranza is in “grave or immediate danger” and implore anyone with information to call (956) 223-2400.