Two police officers and a neighbor saved a woman from a raging house fire early Sunday morning that killed a family dog.

The Suffolk County Police Department said the officers, Frank Saracino and Keith Murphy, responded to a 911 call reporting the fire on Forest Road in Centereach at about 3:15 a.m. to find a house fully engulfed and a woman trapped on the second floor.

Police said Saracino, Murphy and a neighbor from across the street, 43-year-old Thomas Earl, located three ladders and together climbed to the second-floor window and carried the woman down the ladder to safety.

The rescued woman, 66-year-old Rosemarie Donnelly, and Earl were treated for back injuries at Stony Brook University Hospital.

Of the house’s four other occupants, who all escaped the flames on their own, James Donnelly, 72, Rosemarie’s husband, was treated at SBUH for lacerations to his hand and leg; and grandson Justin Donnelly, 26, was treated there for smoke inhalation. The two others, police said, reported having difficulty breathing but refused treatment.

Police said Centereach Fire Department personnel rescued two of the family’s pets, a cat and a dog, but another dog died in the fire.

Detectives from the SCPD’s Arson Section are investigating the fire’s cause, as is the Brookhaven Town fire marshal.