Police are investigating the death of a 2-month-old baby girl at her family’s Harlem apartment Sunday morning, authorities said.

The girl’s mother discovered Kourtny Williams wasn’t breathing and called 911 around 10 a.m.

Police and EMS responded to the Fifth Avenue building near West 112th Street and rushed Williams to Mt. Sinai Hospital where she was pronounced dead.

The death is currently under investigation, although there doesn’t appear to be any wrongdoing, police said.

The Medical Examiner’s office will determine the official cause of death.