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UPDATE: As previously reported, one person is dead and another injured after a house fire at 1011 McGregor Drive west of Knoxville late Sunday.

Sheriff Jason Sandholdt tells KNIA/KRLS News 77-year-old Patricia Henning succumbed to her injuries after firefighters and deputies were able to pull her from the burning house. Ronald Henning, 79, was transported to the burn center at the University of Iowa Hospital. His condition is unknown.

Knoxville Township Rural Fire Chief Kenny Thompson tells KNIA/KRLS News two deputies were on scene first and tried to rescue the Hennings, but flames and smoke were too intense for them to enter. Firefighters then arrived and were able to extract the victims from the burning building.

Sandholdt says the first responders offer their condolences to the family and friends of the victims. The cause of the fire is under investigation.

Original story published at 7:21 a.m.