(CBS) — A newborn baby girl whose body was found in Uptown earlier this week was thrown from a ninth-floor window by her mother, police sources tell CBS 2.

Chicago police detectives have located the mother of the newborn. She reportedly has made a statement admitting she threw the child from her ninth-floor apartment late Wednesday.

Neighbors in the Uptown neighborhood gathered for a vigil Friday where the baby was found, with umbilical cord still attached, in the 800 block of West Eastwood Avenue. The Cook County Medical Examiner’s Office said the girl died of blunt force trauma.

“I would have taken the baby — I’m 71,” building resident Katy Marie Gray tells CBS 2’s Mike Parker.

Police sources say the motive in the killing was family opposition to the pregnancy because the child was mixed-race. The mother is of East Indian descent; the father, African American.

Charges were expected Friday.