The Orange County Sheriff's Office said Tuesday that Adrienne Simmons was participating in the International Kickboxing Match held at a hotel Sunday. During the final third round, she was hit with a left hook that knocked her unconscious.
The fight was stopped and a doctor tended to her. She was taken to a hospital where she was treated for two days before dying.
A sheriff's office spokeswoman says the death is considered an accident.
The tournament was sponsored by the International Kickboxing Federation.
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