Beloit police and fire officials are investigating an early Wednesday morning blaze resulting in the deaths of two people. Firefighters found heavy flames and smoke when they arrived at 1950 Fairview Drive a little before 4:00 o'clock. Police say the 61-year-old Clint Christensen, and 33-year-old Jamie Christensen were killed. 60-year-old Caren Christensen is in critical condition at an area hospital. The State Fire Marshall has been requested to assist in the incident.