Deputies say one man was hurt after trying to rescue a one-year-old child that fell into the water.
The Chippewa County Sheriff's Department says 31-year-old James Braaten of White Bear Lake, Minnesota and three children were on a boat in Lake Holcombe when the one-year old fell overboard.
Deputies say Braaten tried to grab the child but fell into the water as well. He was hit by the propeller while it was still moving. A five-year-old, still on board, turned the key shutting off the motor.
People on shore helped all four out of the water with use of a pontoon boat. Braaten was flown to Luther Hospital in Eau Claire for severe cuts to his leg.
The children, ages 1, 3 and 5 were treated at the scene and released to their mother.
All four were wearing life vests.