Two people have drowned and one person is missing at Ketner's Mill, an official from Marion County 911 said late Thursday.
Officials have located and recovered one body, according to authorities.
At press time officials had located another body but were in the process of recovering it, a Marion County dispatcher said.
The third person has not been located, but officials are treating the situation as a recovery operation rather than a rescue.
Two of the victims were swimmers, and one was a rescuer who tried to save the other two, officials said.