The collapse of a sand hole that killed a 7-year-old Indiana girl who was digging with her brother on a Florida beach is an underrecognized danger that kills and injures several children a year around the country. Sloan Mattingly died Tuesday afternoon at Lauderdale-by-the-Sea's beach when a 4-to-5-foot-deep (1-to-1.5-meter) hole collapsed on her and her 9-year-old brother, Maddox. The boy was buried up to his chest, but the girl was fully covered. Video taken by a bystander shows about 20 adults trying to dig her out using their hands and plastic pails, but the hole kept collapsing on itself. Read more: https://www.9news.com/article/news/nation-world/young-girl-killed-hole-collapse-florida-beach/507-e689f86e-f94a-4eac-92ed-8268d8ca21af ------ More local videos here: https://youtube.com/@9news Subscribe to NEXT: https://youtube.com/@Nexton9NEWS Stay connected: 9NEWS Website: https://www.9news.com/ Facebook: https://www.facebook.com/ilike9news Twitter: https://twitter.com/9NEWS Instagram: https://www.instagram.com/9newsdenver/ Download the 9NEWS App: https://www.9news.com/appredirect/ Sign up for the 9NEWSLETTER: https://www.9news.com/email 9NEWS (KUSA) is located in Denver, Colorado.