Authorities in Mapleton are investigating the death of a 58-year-old Castana man found unresponsive at a Mapleton home. 

According to a press release, authorities were dispatched to a residence in Mapleton around 1:25 A.M. on Saturday. When they arrived, they found a man identified as Daniel Hieber unresponsive. He was transported to a Sioux City hospital, where he was later pronounced dead. 

The Mapleton Police Department is currently interviewing friends, family members, and neighbors about the incident. Anyone with any information regarding the case is being asked to call the Police Department at 1-800-859-1414 or 712-881-1306.