Two Michigan siblings who have been missing since Jan. 22 may be in Colorado, authorities said. According to KOAA-TV, the Colorado Bureau of Investigation on Tuesday issued an Endangered Missing Alert for 7-year-old Bentley Dunkelberger and his sister, 9-year-old Karley Dunkelberger. The pair may be traveling with Dennis and Rebecca Dunkelberger, their parents, in a black 2013 Kia Sorento with Michigan tag 4LUZ90, authorities said. Dennis and Rebecca Dunkelberger “have a history of drug use and violent tendencies when together,” authorities told KOAA. Bentley, who has brown hair and blue eyes, weighs 46 pounds and stands 3 feet, 8 inches tall, the news outlet reported. Karley, who has blonde hair and brown eyes, weighs 61 pounds and stands 3 feet, 10 inches tall, authorities said. Officials said she has autism. Authorities said Dennis Dunkelberger, who has brown hair and hazel eyes, weighs 170 pounds and stands 5 feet, 9 inches tall, according to KOAA. Rebecca Dunkelberger, who is 5-foot-7 and weighs 165 pounds, is described as having green eyes and brown hair. Anyone who has seen the Dunkelbergers should call 911, authorities said. Read more here.