(KRON) -- The Alameda County Sheriff's Office is asking for the public’s help in locating an at-risk missing San Leandro resident. Haiden Martinez, 22, was last seen Monday at their residence on 159th Avenue. Martinez is described as being Hispanic, 5 feet 6 inches tall, 175 pounds, with brown eyes and black hair. They were last seen wearing a black sweatshirt, black pants and black laced boots. Missing person Haiden Martinez (Alameda County Sheriff's Office) The sheriff’s office said that they 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.