Police were called to 2156 Linden Blvd. in the Boulevard Houses public housing complex about 11:30 a.m. They found Halii McCord lying unconscious and unresponsive, an NYPD spokesman said.
The girl had "possible bruising about the body," a police source said. She was rushed to Brookdale Hospital, where she was pronounced dead.
"Beautiful young girl," said a resident who only identified himself as Wayne C. "And the mother, she was a nice young lady.
"That girl was well cared for," Wayne added.
The medical examiner will perform an autopsy Wednesday afternoon to determine the cause of death, a spokeswoman said.
The incident remains under investigation.