May 9 (UPI) -- Multiple injuries were reported Saturday in what rescuers called a "mass casualty" event involving a possible boat explosion at a popular Miami sandbar. First responders to the scene of a possible boat explosion at around 12:45 p.m. "found multiple patients with various injuries, some burned, some minor injuries," Miami-Dade Fire Rescue Battalion Chief Juan Arias told reporters . "All patients were treated and transported to local hospitals," he said, adding that the incident was