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A farmer in Iowa died after he was severely injured by a bull on his farm.

The Madison County Sheriff's Office said they were called to the farm around 7:30 p.m. Sunday.

First responders found 76-year-old Mark Hollingsworth unresponsive in the cattle feeding area of his property, according to the sheriff's office.

Hollingsworth was pronounced dead at the scene.

Investigators said that Hollingsworth entered the bull pen to make sure the cattle's water source had not frozen. The bull then injured Hollingsworth. Family members found him and called 911.

The State Medical Examiner's Office is investigating further to determine whether a medical issue may have left Hollingsworth incapacitated before being injured by the bull.