An Austin Texas man died Sunday during the running of the annual Escape from Alcatraz Triathlon.
Race director Bill Burke said in a statement that the 46-year-old died of a "massive cardiac event" during the swim portion of the race which began at 7:30 a.m.
The event's safety team began administering CPR to the man in the water and while transferring him onto land.
"The thoughts and prayers of the entire Escape from Alcatraz Triathlon team are with the family and friends of the racer as they mourn this loss," Burke said. "Safety is always our top priority."
According to Burke, Sunday's death was the first ever in the event's 33-year history.