A New York City day care operator and a man who rented a room from her are facing federal charges after the death of a 1-year-old exposed to fentanyl inside the day care.

Officials say they discovered a kilogram of fentanyl stored on top of playmats used by children who attended the day care, which was run out of a small Bronx apartment. They also found multiple devices for mixing the powder with other narcotics and pressing it into bricks.