SIOUX FALLS, S.D. (AP) – A 7-year-old Sioux Falls boy died after drowning at a community pool in Lake Preston. Isaaya Ayafa was at the pool with his 9-year-old brother on Friday when he was found “breathing but unresponsive.” He was initially taken to a hospital in De Smet before being flown by helicopter to Avera McKennan Hospital in Sioux Falls, where he died on Monday. A lifeguard at the pool says children under 8 are required to be under the supervision of someone 13 or older, but that kids sometimes slip by. Kingsbury County Sheriff Kevin Scotting says the incident remains under investigation.