13 people hospitalized due to dangerous carbon monoxide levels at an Ohio hotel swimming pool

The Hampton Inn in Marysville was evacuated Saturday after a 911 call reported the young girl unconscious, Police Chief Tony Brooks said.

“Shortly after this call, the local 911 Center received additional calls (referencing) unconscious subjects in and around the pool area,” Brooks told CNN via email. “Others described symptoms such as dizziness and a burning in their throat.”

Nine people, including the 2-year-old, were taken to local hospitals, and four others arrived to the hospital on their own, Brooks said, adding their conditions were not known. Two other people received medical evaluations at the scene and were not hospitalized.

“We did have life threatening levels of carbon monoxide in the pool area of the hotel and we transported several people to local hospitals,” Marysville Fire Chief Jay Riley told CNN in an email. “We continue the investigation into the source and (are) glad that no one died as a result of their exposure.”