Tragedy struck a Florida beach on Tuesday when a 7-year-old girl died after a sand hole she was playing in with her brother collapsed, burying them both. The incident occurred in Lauderdale-by-the-Sea, a coastal town near Miami, where Sloan Mattingly and her 9-year-old brother, Maddox, were on vacation with their family from Indiana, according to the Broward County Sheriff’s Office.