(St. Paul, MN) -- Minnesota researchers are connecting unsafe sleep positions to the majority of sudden unexplained deaths of infants. The state Department of Health announced yesterday that over 80-percent of the sudden unexplained infant deaths reported in Minnesota in 2016 and 2017 were related to sleeping. Most involved babies placed for sleep on surfaces other than cribs, or with loose bedding, fluffy blankets or toys. These things present suffocation hazards. The American Academy of Pediatrics recommends that infants sleep on their backs.