Candles lit for an evening meal on a three-season porch and left unattended started the fire at a New Ulm, Minn., bed and breakfast that killed six people early this month, according to state investigators' findings released Monday.
The report said the fire at the Bohemian Bed and Breakfast has been ruled accidental.
The determinations were made by the New Ulm fire and police departments and the state fire marshal's office.
"Based on witness statements and fire patterns ... the fire built energy before breaking into the home through the picture windows of the TV and the grand staircase area," according to a report by state fire marshal investigator Denise DeMars.
Those killed in the July 2 fire were Roberta McCrea, 48, owner of the Bohemian; Abby Wood, 15, and Savannah McCrea, 3, her daughters; and lodgers Andrew Uhing, 67, of Hartington, Neb., and Joseph Bergman, 62, and Dian Bergman, 59, both of Centuria, Wis.
Five died of carbon monoxide poisoning, and Joseph Bergman died from burns, according to the Ramsey County medical examiner.
Three others escaped: Charles Zangl, 53, McCrea's fiancé and Savannah's father; and Diane Frye, 54, and Charles Frye, 58, of Plymouth.
Penny Purtzer, whose aunt and uncle sold the home to McCrea in 2002, said that the knowledge of the fire's cause gives her little comfort: "We all knew that it wouldn't make us feel any better when we learned the cause. ... Bobbi and the girls are gone."