An officer who responded to the drowning incident also died, authorities said.
The 16-year-old girl and 13-year-old boy fell through the ice near boat docks at Rocky Fork State Park in Hillsboro on Tuesday evening, according to the Ohio Department of Natural Resources. The 911 call came in around 6:30 p.m.
By the time the Paint Creek Joint EMS and Fire District arrived, the girl was under the ice, according to Lt. Branden Jackman. The water was 36 degrees, he said.
The boy was taken to the hospital and was stable, but his sister was recovered by divers unresponsive, authorities said. She has not been identified publicly by authorities.