Elizabeth Gardens Apartments, 801 NE 33rd St., according to the Broward Sheriff's Office.
Authorities do not think foul play was involved in the child's death, according to Keyla Conception, spokeswoman for the Sheriff's Office. The medical examiner's office will make the official determination.
The child started feeling sick the night before, Conception said. "The grandmother put the baby to sleep and when she went to check on her in the morning, the baby was cold."
The grandmother called 911. Firefighters who went to the apartment pronounced the girl dead, she said.
The St. Elizabeth complex houses low-income seniors, according to its website.