Pit bull puppy didn’t kill Queens newborn — medical examiner shockingly says injuries happened after baby’s death

A 1-month-old Queens girl was not mauled to death by a pit bull puppy inside the family’s housing project home — but died of unknown causes before the tiny puppy wound up biting her, the city medical examiner revealed Wednesday.

Police initially believed the tragic tot had been killed by the six-week-old  pup while her parents slept in their apartment at Queensbridge Houses public housing complex early Tuesday morning.

However, the New York City Office of the Medical Examiner the dog bit off a “substantial portion” of her tiny face only after she had already died.

“The cause and manner of death are pending further study following the examination today,” a spokesperson for the office said in an email. “But we can confirm this is not a death from a dog mauling. The injuries inflicted by the dog were postmortem.”

Cops made the gruesome discovery after the baby’s mother called 911 shortly after 6:30 a.m. Tuesday after finding her daughter mauled by the dog – initially believed to be what killed her.

Neighbors reported hearing screams from the apartment before cops and EMS arrived at the scene.

Police are still investigating the incident and no charged have been filed in the case.