GET INFORMED: Have you ever wondered what to do when someone you know goes missing? Hit play for a full break down.HOUSTON, Texas (KTRK) -- An 11-year-old and 13-year-old are safe after they were announced missing Sunday, Harris County Sheriff's Office says.Siblings Martha, 13, and Mario, 11, were found safe sometime before 11:30 p.m., deputies say. No further details about how or where the siblings were found has been released. Report a correction or typo