Authorities are investigating the death of a baby from the lower Sioux Community in Redwood County.The Redwood County Sheriff's office says they received a call Monday from a residence on Highway 3 indicating the baby was not breathing.The baby was pronounced dead at Redwood Falls Hospital.At this time, investigators are only saying that the death is not from natural causes and that their report will be sent to the County Attorney's office, which will make a decision whether criminal charges will be filed.