The Madison County Sheriff’s Office is investigating the death of a 76-year-old farmer in Winterset after he was injured by a bull.

A 76-year-old man was killed by a bull while checking to see if his animals’ water source was frozen on his farm, Iowa deputies said. Family members made the grim discovery the evening of Jan. 19, when they found Mark Hollingsworth unresponsive in the cattle-feeding area, the Madison County Sheriff’s Office said in Jan. 20 Facebook post.

Dozens of schools across Eastern Iowa will be closed or delayed Tuesday amidst this week's dangerous wind chills.Cedar Rapids, Linn-Mar, and Iowa City Community

It’s Iowa’s coldest morning of the winter so far, with sub-zero temperatures and very bitter wind chills. National Weather Service meteorologist Rod Donavon says an Extreme Cold Warning is posted for almost the entire state.