Photo of subject connected to Nancy Guthrie's disappearance

Officials say a person has been detained for questioning in the disappearance of Nancy Guthrie. The Pima County Sheriff’s Department said in a statement Tuesday night that deputies detained someone during a traffic stop south of Tucson. The department later said a location in Rio Rico, about an hour's drive from Tucson, was being searched. The news was another potential break in a case that has gripped the nation for more than a week. It came hours after the FBI released surveillance images of a masked person with a handgun holster outside Guthrie’s front door the night she vanished. It wasn’t clear if the person being questioned is the same person captured on surveillance video.