State health officials said Monday dozens of people have been sickened after swimming at a beach in Burrillville.
Health Department officials said they closed the Spring Lake Recreation Facility after learning that several people who swam there on the Fourth of July became ill.
At least 85 people have reported symptoms, and of those, 10 have been hospitalized. Health officials said 80 percent of those sickened are under the age of 18.
The beach remains closed.
The source of the illness has not yet been identified, but health officials say it doesn't appear that food caused the illnesses.
Andrea Bagnall Degos of the Rhode Island Department of Health said officials tested the water Monday for fecal coliform and E. coli. She said all tests came back negative.
Degos encouraged those who are feeling sick and have been in the water there to talk to their doctors.
"This is not something that doctor's typically fool around with at all," she said. "We do want people to be vigilant if they have been there and they have symptoms of cramping, diarrhea, vomiting, those sorts of things, it's really important that they go see their doctor."
The beach doesn't have a history of high bacteria counts.
The Associated Press contributed to this report.