The blaze broke out at a home on Winding Way shortly after 7:45 a.m. Tuesday, Byram Twp. Fire Department said on Facebook.
Fire crews needed extra time to get the blaze under control after discovering a partial collapse of the home, officials said.
Additional resources were brought on scene after a second alarm was struck, officials said.
While no one was home at the time of the fire, the family dog did not survive, officials said.
The fire is being investigated by the Byram Police Department, Sparta Fire Official and the Sussex County Fire Marshal’s Office.
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