 Shortly before 11 a.m. local time, police on South Padre Island rushed to the scene of a woman bitten on her left leg by a shark while swimming in the ocean. Good Samaritans and first responders are pulling the woman from the water and wrapping a tourniquet around her leg to slow the bleeding. A dorsal fin can be seen swimming back and forth near the shoreline, but it's unclear if that's the shark responsible.