A woman and her 6-year-old granddaughter were the two people killed in a fire at a New Jersey duplex this week, authorities announced Friday.
However it was still not clear what caused the fire that was reported around 2:20 p.m. Wednesday in Edison.
Kathleen O'Callahan, 56, of Edison, was pronounced dead at the scene, while her granddaughter died at a hospital later that day. The 6-year-old girl's name has not been released.
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Authorities have not said whether either victim lived at the 2 1/2 story home on Jill Court, or what caused their deaths. The inferno appeared to have started on the lower levels and spread to the higher floor, leaving a hole in the ceiling and causing extensive damage.
A dog was also killed in the fire, which firefighters were able to put out by 4 p.m.
The cause of the blaze remains under investigation.