UPDATE Posted Saturday, June 7 --- 12:10pm

BELOIT TOWNSHIP, Wis. (AP) -- Autopsy reports say it was carbon monoxide that killed a 70-year-old couple in their home this week in Beloit Township.

Officials say they still haven't determined the cause of the fire at the home of Carol and Paul Brom.

Town of Beloit Fire Department Lt. Al Cass says investigators haven't ruled out that the cause was electrical. But there's still no official determination.

He says the fire started in the lower level of the home near a loveseat and fire fighters didn't find working smoke detectors in the home.

After the fire erupted late Wednesday night, Carol Brom was taken to Beloit Memorial Hospital where she was pronounced dead.

Fire fighters found Paul Brom's body in the home.

Copyright 2008 by The Associated Press. All Rights Reserved.

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UPDATE Posted Thursday, June 5 --- 3:25 p.m.

According to the Rock County Coroner, the preliminary autopsy results for Paul and Carol Brom have determined the primary cause of death to be carbon monoxide poisoning secondary to the residential fire. Final autopsy and toxicology results are pending. The cause of the fire is under investigation.

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UPDATE Posted Thursday, June 5 --- 10:30 a.m.

The Rock County Coroner’s Office is investigating the deaths of Paul Brom, 70, and Carol Brom, 70, related to a residential fire on S. Dewey Ave. in Beloit Township on Wednesday night. Autopsies for both victims are scheduled for Thursday morning at the VA Hospital in Madison. The cause and manner of death is pending further investigation.

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Posted Thursday, June 5 --- 7:10 a.m.

Two people died in a fire overnight in Beloit Township.

According to a news release from the Town of Beloit, the fire broke out around 11:20 p.m. Wednesday at a house at 2474 S. Dewey Avenue. One person was pulled to safety by firefighters and transported to Beloit Memorial, but later died. A second victim was found in the house later.

The cause of the fire remains under investigation and a state fire marshal will report to the scene at 8:00 am today. Damage estimates have not been determined.