Police are questioning the infant's mother, but no arrests have been made

A baby girl was found dead with her umbilical cord still attached on Monday afternoon after allegedly being thrown out a seventh-floor window of a New York City apartment, an NYPD spokesman tells PEOPLE.

The child was discovered unresponsive and unconscious by the building superintendent’s wife in an alleyway outside the Bronx residence at around 3 p.m., according to The New York Times. She then called police, who ultimately declared the girl dead at the scene.

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“To be honest, I’ve never seen something so unhuman like that; I don’t know what those people were thinking about. I don’t know what kind of mother would be to do that,” Fonzi Vucinaj, whose mother found the child, told ABC News.

Police are questioning the infant’s mother, who has not been identified, in connection with her death, but thus far no arrests have been made. The mother is being treated at a nearby hospital.

Authorities also located the infant’s father, who told police that he had no idea the mother was even pregnant, ABC reports. He has since been released.

Neighbors are shocked by the brutal death. “It’s just something that’s so ridiculous. I can’t believe that someone would throw their own baby out the window,” D. Joshua Charleston told ABC.

Added another neighbor: “It’s crazy you know, a turn of events, a bad turn of events. We are all still wondering what’s going on.”

The investigation is ongoing.

In August, a baby boy was allegedly thrown to his death from an apartment building in Queens.