(KRON) -- Authorities in the South Bay are asking for the community’s assistance in locating an at-risk missing 14-year-old child last seen Monday morning in Cupertino. Mia “Alex” Rivas is described by the Santa Clara County Sheriff’s Office as 5 feet 8 inches tall and weighing 110 pounds, with brown hair and brown eyes. Missing person Mia "Alex" Rivas (Photo: Santa Clara County Sheriff's Office) Rivas was last seen on camera at 4:50 a.m. Monday near North Tantau Avenue and Stevens Creek Boulevard while wearing black pants, a black sweatshirt with white stars and blue sneakers with rainbow beads on the laces, according to the sheriff’s office. The Santa Clara County Search and Rescue Team used canines to search the area Monday but was not located. Anyone with information or who sees Rivas is asked to call 911. ...read more read less