The flames broke out just before 1:00 a.m. in the 1400 block of North Newkirk Street in the Brewerytown section of North Philadelphia.
When firefighters arrived they found flames spitting out of both the first and second floors.
The victims have been identified as 48-year-old Jacqueline Cooper, 32-year-old Tia Cooper and 8-year-old Kyra Cooper.
Tia Cooper died after jumping out of a second story window. The bodies of her daughter and mother were found in a second floor bedroom.
Ayers tells Action News that records show his department placed two working smoke detectors with 10-year lithium batteries in the house last fall.
There is no evidence those smoke alarms were still in the home. Investigators did find two, old smoke alarms in the rubble, but they were not the ones installed by the fire department.
"We're looking for some smoke alarms that we actually installed in November '08 at this address," said Fire Commissioner Lloyd Ayers. "We checked this address in our database, and there should be no reason for no smoke alarms in this house."
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