The Madison County Sheriff's office is investigating two incidents that are described by that office as inter-related. Two death investigations are underway in the Highland, and Glen Carbon area. Authorities have not yet identified the two people who are deceased.

At about 5:30am, authorities responded to a fire in Glen Carbon where one person died, and six children escaped. At about the same time as the fire, a passerby reported a vehicle in a lake just off of Illinois Route 143 in Highland. An infant was pulled from that vehicle and flown to a St. Louis hospital, and Madison County Sheriff John Lakin credits Highland EMS Paramedic Todd Zobrist with saving the baby's life. 
 

Authorities later pulled a body from the lake. Neither of the deceased have been identified yet. Autopsies on the victims from both scenes are scheduled for Friday. 

Madison County Sheriff John Lakin says documents were found in the submerged vehicle linking it to the house where the fire had occurred.