Investigators now say two men have now died after an incident on a farm in Douglas County, Minnesota on Saturday.
Deputies responded around 10:50 a.m. to the farm on Gravel Pit Road, just outside of Millersville.
According to deputies, they received a call for two people down and unresponsive inside a silo. Shortly after, dispatcher learned a third person was down in the silo.
At the scene, first responders were able to get the three victims out of the silo. Two victims, a father and son, were treated at the scene and then flown by Life Link III helicopter to the hospital. Sadly, the father as pronounced dead at St. Cloud Hospital. The third victim, an uncle, was pronounced dead at the scene.
Deputies say they were told that the father, 47-year-old Curt Francis Boesl, and his 11-year-old son were working at the top of the silo when they were overcome by fumes. Another son, who saw what happened, called 911 and then called his uncle, 49-year-old Steven Timothy Boesl, who lived nearby.
The uncle got to the farm and also apparently was overcome by the fumes while trying to rescue his brother and nephew.
A medical examiner will work to determine the exact cause of death for both men.