OKLAHOMA CITY — About 20 athletes have become sick after participating in a triathlon earlier this month that included a swim in the Oklahoma River, which has had problems with fecal coliform pollution.

Oklahoma State Department of Health spokeswoman Leslea Bennett-Webb said Tuesday it is too early to determine the cause of the illness, symptoms of which included diarrhea, vomiting, fever and abdominal pain.
She said she didn’t know if anybody had been hospitalized.
The Boathouse International Triathlon was held May 16-17.