State child welfare authorities are investigating the death of a 4-month-old girl Sunday morning in the East Garfield Park neighborhood on the West Side.

Officers responding at 8:43 a.m. to a home in the 2700 block of West Wilcox discovered the girl was not breathing, according to Chicago Police.

The girl, who lived in the home, was taken to Mount Sinai Hospital, where she was pronounced dead at 9:21 a.m., police and the Cook County medical examiner’s office said. An autopsy Monday did not rule on her cause and manner of death pending further studies.

The Illinois Department of Children and Family Services is investigating the girl’s father for allegations of neglect, a department spokeswoman said. That investigation is pending.

The department has not had prior contact with the family and there were no other children living in the home, DCFS said.

Area North detectives are investigating.