(KRON) -- The Alameda County Sheriff's Office is asking for the public’s help in locating an at-risk missing San Leandro woman. Haiden Martinez, 22, was last seen Monday at her residence on 159th Avenue. Martinez is described as being Hispanic, 5 feet 6 inches tall, 175 pounds, with brown eyes and black hair. Authorities do not know what Martinez was wearing when she left her home and was last seen. Missing Person Haiden Martinez (Alameda County Sheriff's Office) The sheriff’s office said that she may be in the Union City or Fremont areas. “We are all concerned about Haiden’s safety,” the sheriff’s office said. Anyone with information is asked to contact the Alameda County Sheriff’s Office at (510)-667-7721 or local law enforcement.